Skip to Content Skip to Navigation

Part 21

PROTECTION OF PERSONS EMPLOYED AT WINDOW CLEANING--STRUCTURAL REQUIREMENTS, EQUIPMENT AND PROCEDURE

(Statutory authority: Labor Law, §§27-a, 27, 29, 200, 202)

Sec.

21.0   Finding of fact
21.1   Application
21.2   Definitions
21.3   General provisions
21.4   Authorized means and methods
21.5   Working from safe surfaces or cleaning from the inside
21.6   Working from window sills or ledges
21.7   Working from ladders
21.8   Working from boatswain's chairs
21.9   Working from scaffolds
21.10 Authorized installation of anchors
21.11 Specifications for safety belts
          FIGURE 1 - Belt Terminal
21.12 Test requirements for safety belts
21.13 Specifications for anchors and anchor fastenings
          FIGURE 2 - Single Head Anchor
          FIGURE 3 - Double Head Anchor
          TABLES
21.14 Existing installation of approved anchors
21.15 Approvals and variations
21.16 Severability

Historical Note
Part amd., filed Feb. 18, 1964 to be eff. Feb 25, 1964. In Part title added "Structural * * * Procedures".

§ 21.0 Finding of fact.

     The board finds that the trade, occupation or process of cleaning the windows of public buildings involves such elements of danger to the lives, health or safety of persons employed therein as to require special regulations for the protection of such persons, in that such trade, occupation or process necessarily involves the constant hazard of falling from dangerous heights and creates a substantial risk of serious injury to such persons and others.   back

§ 21.1 Application.

     (a)   This Part applies to the trade, occupation and process of cleaning the windows of the public buildings which are subject to the provisions of section 202 of the Labor Law; it applies also to the owners of such buildings, to the cleaners and their employers, and to all persons providing equipment required by this Part.

     (b)   For the purpose of applying this Part in accordance with the provisions of section 202 of the Labor Law:

     (1)   the term multiple dwelling as therein used is construed to mean and include every building within the definitions of "multiple dwelling" set forth in the Multiple Dwelling Law and the Multiple Residence Law;

     (2)   the phrase stories in height is construed to mean the number of stories of height using the word "story" as defined in the Multiple Dwelling Law and the Multiple Residence Law and including as the first story the one whose floor level is at or next above the lowest level of the adjoining ground;

     (3)   the word building is construed to mean a part of a building as well as an entire building, so that a distinct part of a building having a characterizing occupancy, such as a factory, mercantile, or residence occupancy, constitutes a building having such occupancy in all respects as if it were a separate structure.   back

§ 21.2 Definitions.

     As used in or in connection with this Part, the following terms mean:

     (a)   Anchor.   Window cleaners' safety anchor.

     (b)   Approved.   In compliance with a subsisting resolution of approval adopted by the board.

     (c)   Authorized.   Specified by rule or resolution of the board for use in complying with the provisions of this Part.

     (d)   Industrial Board of Appeals.   The New York State Board of Standards and Appeals.

     (e)   Cleaner.   A person doing the actual work of cleaning a window.

     (f)   Commissioner.   The Industrial Commissioner of the State of New York.

     (g)   Extension device.   A hand tool used to do window cleaning on surfaces beyond the normal reach of the window cleaner.

     (h)   From the inside.   From a position in which all of the cleaner's body except one arm is interior to the window sash.

     (i)   From the outside.   From a position in which more of the cleaner's body than one arm is exterior to the window sash.

     (j)   Owner.   The owner of a public building which is subject to the provisions of section 202 of the Labor Law, or the lessee of the whole thereof', or the agent, manager or superintendent in charge of the property.

     (k)   Public building.   "Public building" shall include a factory building, an office building, a mercantile building, a hotel building, a theatre building, a warehouse building, an apartment building, a State or municipal building, a school, a college or university building, a building containing a place of public assembly maintained or leased for pecuniary gain, or any other building more than one story high except a dwelling house less than three stories high or occupied by less than three families. (Labor Law, § 2, subd. 13.)

     (l)   Shall.   The word "shall" is always mandatory.

     (m)   Unobstructed.   Unobstructed during window cleaning operations.

     (n)   Window.   A window installed in a public building which is subject to the provisions of section 202 of the Labor Law.   back

§ 21.3 General provisions.

     (a)   Owner's statement required.   Before windows or window anchors are installed in a building subject to section 202 of the Labor Law a sufficient statement of the proposed means and methods of cleaning such windows shall be submitted by the owner (as defined) to the commissioner.

     (b)   Means and methods required.   (See § 21.4, infra.)

     (1)   No owner shall suffer or permit a cleaner to clean a window of his building unless it has the structural features and the anchors or other fixed devices required by this Part in respect to the authorized means and methods of cleaning used by the cleaner.

     (2)   No employer shall suffer or permit an employee to clean a window otherwise than in accordance with an authorized means and method. Every employer must provide or cause to be provided to a cleaner in his employ the portable equipment, devices and materials specified in respect to the authorized means and methods used by such cleaner.

     (3)   No cleaner shall clean any window otherwise than in accordance with an authorized means and method.

     (c)   Employees under 18.   No employer shall suffer or permit an employee under the age of 18 years to clean windows.

     (d)   Defective windows and structures.   (1)   No owner shall suffer or permit a cleaner to clean any window installed in his building if any part of such window or surrounding structures upon which the cleaner may depend for support is so defective, damaged or deteriorated as to affect its structural strength, or if any part of such window which must be opened during cleaning cannot be operated easily.

     (2)   The owner shall repair or replace any defective part upon which the cleaner may depend for support.

     (e)   Unsafe equipment prohibited.   (1)   No person shall wilfully sell, lend, provide or suffer or permit the use of, window cleaning equipment that is unsafe in any respect.

     (2)   No employer shall suffer or permit a cleaner to use rope which has sustained wear or deterioration materially affecting its strength.

     (f)   Maintenance of equipment.   (1)   Window cleaning equipment shall be maintained in good repair at all times.

     (2)   Safety belts shall be hung up in a dry place and protected from damage when not in use.

     (3)   All fiber and wire rope shall be stored in a dry place and protected against contact with corrosive substances.

     (g)   Employer's inspection of equipment.   Safety belts, ladders and scaffolds and boatswain's chairs with their supporting tackle, shall be examined at least once each month by the employer and he shall not suffer or permit the use of such equipment while it is unsafe in any respect.

     (h)   Installation of unapproved anchors.   No person shall install an unapproved anchor.

     (i)   Unauthorized installations--removal by owner.   Every unapproved anchor and every unauthorized installation of an anchor, and every anchor of which the fastenings or supports are damaged or deteriorated, shall be removed or rendered unusable by detachment of the anchor head.

     (j)   Misuse of anchors.   An installed anchor shall not be used for any purpose other than attachment of an approved safety belt.

     (k)   Shutter bars.   Shutter bars on windows which are cleaned from the outside shall be maintained in sound condition and shall be fastened with iron throughbolts at least three eighths inch in diameter and provided with proper size washers and means to prevent loosening of the nuts.

     (l)   Extension devices.   (1)   A cleaner using an extension device above the first floor shall attach it to his person by a wrist loop or otherwise to prevent dropping.

     (2)   Each extension device used above the first floor shall have a locking device to prevent inadvertent detachment of the brush or squeegee.   back
Historical Note
Subd. (a) amd., filed Feb. 18, 1964 to be eff. Feb. 25, 1964. New subd. added, former subd. relettered (b). Subd. (b) amd., filed Feb. 18, 1964 to be eff. Feb. 25, 1964. Subd. (b) relettered (c), former (a) relettered (b) and in catchline deleted "Authorized". Subd. (c) amd., filed Feb. 18, 1964 to be eff. Feb. 25, 1964. Subd. (c) relettered (d), former (b) relettered (c). Subd. (d) amd., filed Feb. 18, 1964 to be eff. Feb. 25, 1964. Subd. (d) relettered (e), former (c) relettered (d) and in catchline added "and structures"; new par. (1) substituted and par. (2) added. Subd. (e) amd., filed Feb. 18, 1964 to be eff. Feb. 25, 1964. Subd. (e) relettered (f), former (d) relettered (e). Subd. (f) amd., filed Feb. 18, 1964 to be eff. Feb. 25, 1964. Subd. (f) relettered (g), former (e) relettered (f). Subd. (g) amd., filed Feb. 18, 1964 to be eff. Feb. 25, 1964. Subd. (g) relettered (h), former (f) relettered (g). Subd. (h) amd., filed Feb. 18, 1964 to be eff. Feb. 25, 1964. Subd. (h) relettered (i), former (g) relettered (h). Subd. (i) amd., filed Feb. 18, 1964 to be eff. Feb. 25, 1964. Subd. (i) relettered (j), former (h) relettered (i). Subd. (j) amd, filed Feb. 18, 1964 to be eff. Feb. 25, 1964. Subd. (j) relettered (k), former (i) relettered (j). Subd. (k) amd., filed Feb. 18, 1964 to be eff. Feb. 25, 1964. Subd. (k) relettered (l), former (j) relettered (k). Subd. (1) added by relettering, filed Feb. 18, 1964 to be eff. Feb. 25, 1964. Formerly subd. (k).

§ 21.4 Authorized means and methods. (See § 21.3, subd. [b], supra.)

     The following means and methods are authorized for window cleaning as hereinafter set forth:

     (a)   working from safe surfaces.

     (b)   Working from window sills or ledges.

     (c)   Working from ladders.

     (d)   Working from boatswain's chairs.

     (e)   Working from scaffolds.   back

Historical Note
Sec. amd., filed Feb. 18, 1964 to be eff. Feb. 25, 1964. In first sentence substituted "subd. [b]" for "subd. [a]".

§ 21.5 Working from safe surfaces or cleaning from the inside.

     (a)   Working position.   In using this method for cleaning from the inside the cleaner shall work from a position on the floor or other interior surface or on an interior sill which is not more than six feet above a floor or stair landing or more than three feet above a stair run.

     (b)   Working surface.   In using this method for cleaning from the outside the cleaner shall work from a position on the ground level or on a roof, balcony or other structural part of the building which is capable of sustaining the weight of the cleaner and his equipment. The surface on which the cleaner works shall not be pitched more than one inch in 12 inches. It shall either extend six feet or more about the working position or be provided with a firm railing or parapet at least 32 inches high.

     (c)   Cleaning from inside.   When cleaning from the inside the cleaner shall not place or extend more of his body than one arm beyond the window sash.

     (d)   Objects on working surface.   The cleaner shall work from the safe surface and not from any unstable object placed thereon. This does not apply to authorized working from ladders and does not prohibit the use of firm and level working platforms.

     (e)   Slippery surface.   The cleaner shall not work from a surface on which there is snow, ice or other slippery substance.   back

§ 21.6 Working from window sills or ledges.

     (a)   Use of method.   (l)   A cleaner shall not be suffered or permitted to clean a window from the outside by this method except a window which is so constructed, equipped and maintained as to be safe for cleaning by the use of anchors and safety belts (herein called a safe window) and certain other windows below described.

     (2)   A safe window is one which complies with all of the following requirements:
     (i)   It shall not be horizontally pivoted.

     (ii)   If it is vertically pivoted or hinged it shall afford an unobstructed passage space to the exterior sill at least 16 inches wide and 40 inches high, and it shall be so constructed that when it is open it does not interfere with the attachment of the safety belt terminals to the anchors.

     (iii)   If it is double-hung or counterbalanced it shall afford an unobstructed passage space to the exterior sill not less than 21 inches wide and 30 inches high from the sill.

     (iv)   It shall afford a safe way of approach from an interior floor level to the passage space.

     (v)   It shall have an unobstructed sill or ledge providing a footing at least four inches wide or the full width of the window frame.

     (vi)   It shall have its movable parts readily operable and in good condition.

     (vii)   It shall be structurally adapted to an authorized installation of anchors.

     (b)   Special windows.   (1)   Where three windows with two separating mullions are set in the same wall opening, and the center window is a safe window and the sash openings of the two outer windows are less than 21 inches wide, this method may be used to clean the outer windows from a position on the sill or ledge of the safe window.

     (2)   Where three windows with two separating mullions are set in the same wall opening, and the two outer windows are safe windows, and the center window is not a safe window, this method may be used to clean the center window from a position on the sill of either safe window or astride either mullion.

     (3)   Where a single fixed sash window has adjacent thereto a safe window on either side with separating pilasters 16 inches or less in width and six inches or less in depth from their face to the glass and the fixed sash window has a sill at least three inches deep, this method may be used to clean the fixed sash window from a position on the sill of either safe window or astride either pilaster.

     (c)   Anchors required.   A window cleaned by this method shall be equipped with approved anchors, installed as authorized, and so maintained.

Exception:    A window having the sill or sills from which the cleaning is done not more than six feet above the
ground, the floor or an equivalent surface.

     (d)   Safety belt required.   The cleaner shall be provided with an approved safety belt.

Exception:   When working from a sill or ledge not more than six feet above the ground or an equivalent surface.

     (e)   Attaching safety belt.   The cleaner shall attach one belt terminal to an anchor without extending more than one arm beyond the window sash before climbing out, and the other terminal to the opposite anchor before or immediately upon climbing out. When cleaning is done from an interior sill six feet or more high both terminals shall be attached to anchors before work is begun.

     (f)   Keeping both terminals attached.   The cleaner shall keep both belt terminals attached to separate anchors during the cleaning operation.

     (g)   Keeping one terminal attached.   The cleaner shall keep one belt terminal attached to an anchor until he has returned inside the window.

     (h)   Passing.   The cleaner shall not pass from one window to another or from one part of a multiple window to another at a level more than six feet above the adjoining floor or ground surface.

     (i)   Slippery sills.   The cleaner shall not work on a sill or ledge on which there is snow, ice or other slippery substance.

     (j)   Objects on sills.   The cleaner shall not stand or support himself on any object placed on a sill or ledge.

     (k)   Using defective anchor.   The cleaner shall not be suffered or permitted to use an anchor which is inaccessible, loose, damaged, deteriorated or altered.

     (l)   Using defective safety belt.   The cleaner shall not be suffered or permitted to use a safety belt which has been used for testing purposes or which is materially damaged, deteriorated or excessively worn in any part. A terminal slot is excessively worn if any point accommodates a nine-sixteenths inch plug gauge.   back

§ 21.7 Working from ladders.

     (a)   Use of method.   The use of this method is prohibited for cleaning a window where any of the following conditions exist:

     (1)   The interior surface of the window is to be cleaned and the top of such window is more than 35 feet above the nearest interior floor or equivalent surface on which the base of the ladder is to be placed.

     (2)   The exterior surface of the window is to be cleaned and the top of such window is more than 35 feet above the nearest street or ground surface.

     (3)   The window is so placed or obstructed as to make the method unsafe.

     (b)   Ladders over 18 feet--holding.   At all times when a cleaner is working on a ladder over 18 feet long, a person shall stand at the foot of it, face it and hold it with both hands.

     (c)   Sidewalk doors.   No ladder shall be rested on a sidewalk door.

     (d)   Protection against slipping.   All ladders shall be provided with means to prevent slipping suitable to the bearing surface.

     (e)   Inspection of ladders.   Each ladder shall be inspected at least once a month by the person who owns it.

     (f)   Painting of wood ladders.   A wood ladder shall not be painted with other than a transparent material.

     (g)   Maintenance and replacement.   Ladders shall at all times be maintained in a safe condition. Any ladder having a broken member or part, or any insecure joint between members or parts or any flaw or defect of material that may cause failure, or any rung or step that is worn down to three quarters or less of its original thickness, shall be immediately taken out of service for necessary repairs or replacement.

     (h)   Strength.   Ladders, including all load-bearing parts and connections, shall be designed and constructed to sustain without failure a concentrated load of not less than 600 pounds.

     (i)   Wood ladder construction.   Wood used in the construction of ladders shall be thoroughly seasoned, sound, clear and straight-grained and the slope of the cross grain shall not exceed one in 15 at any point for rungs, steps or cleats, and shall not exceed one in 12 for rails. Wood used in side rails shall be at least equivalent in strength and durability to Sitka spruce. Rungs shall be of commercial white ash, white oak or hickory. Load bearing metal parts shall be of steel, wrought iron, malleable cast iron or other metal of equivalent strength and durability.   back

Historical Note
Sec. amd., filed Sept. 1, 1966 to be eff. Oct. 1, 1966. New subd. (a) substituted.

§ 21.8 Working from boatswain's chairs.

     (a)   Approval required over 75 feet.   After October 1, 1967, a boatswain's chair which is suspended from a point with an elevation of more than 75 feet above the nearest street or ground surface shall be approved for the specific building and location where it is to be used to clean windows. Approval will not be considered unless other authorized means of cleaning the windows have been found impracticable or impossible due to the exterior features of the building.

     (b)   Suspended point height of 75 feet or less.   A manually operated boatswain's chair which is suspended from a point with an elevation of 75 feet or less above the nearest street or ground surface is not required to be approved but shall conform to the following requirements:

     (1)   Safety belt and lifeline required.  Each person working from a boatswain's chair shall be provided with and shall use an approved safety belt and a lifeline consisting of a hanging line and a tail line. The tail line shall be of minimum practical length and shall be attached to the hanging line by an approved special device to allow vertical adjustment of the point of attachment.
Note:    See section 23.30 of Industrial Code Part (Rule No.) 23.

     (2)   Protection of street or ground area.  Where a boatswain's chair is suspended over an area traversed by pedestrians or vehicular traffic, the ground area directly under the chair work zone shall be effectively blocked by barricade, or an attendant shall be stationed so as to keep the area clear.

     (3)   Skilled operators.  Persons not trained in the use of boatswain's chairs shall not use such equipment.

     (4)   Chairs.  Boatswain's chairs and all supports shall be designed and constructed to sustain without failure a minimum load of 600 pounds. Each chair shall be suspended from its four corners by means of rope slings, have a seat not less than 24 inches long by 10 inches wide and two inches in thickness if of soft wood or one and one-eighth inches in thickness if of oak or ash, and be reinforced across the full width by cleats securely fastened to each end. The chair seat may be constructed of material other than wood, provided the material is equivalent in strength to two inches of soft wood or one and one-eighth inches of oak or ash. If constructed of material of equivalent strength, cleats across the full width of the seat shall be provided unless structural analysis indicates they are not necessary.

     (5)   Tackle.  Tackle shall consist of rope at least equal in strength to five-eighths inch first grade Manila rope and proper sized blocks. Rope attachment to a block shall be by a thimble and splice. Hooks shall be provided with means to prevent accidental disengagement.

     (6)   Anchorage.  The object to which the tackle is anchored shall be rigid and of ample strength.

     (7)   Tie-ins.  Tie-ins shall be provided for boatswain's chairs and used by the cleaner to prevent sway during the window cleaning operation.

     (c)   Powered boatswain's chairs.   A powered boatswain's chair used for window cleaning shall be approved in respect to its hoisting machine and shall be subject to the requirements set forth in this section in subdivision (a) and paragraphs (1), (2), (3), (4), (6) and (7) of subdivision (b).   back

Historical Note
Sec. amd., filed Sept. 1, 1966 to be eff. Oct. 1, 1966. New sec. substituted.

§ 21.9 Working from scaffolds.

     (a)   Compliance with Part (Rule No.) 23.   Every scaffold used for cleaning by this method shall be designed, constructed, installed, operated and maintained in compliance with all relevant provisions of Part (Rule No.) 23, Protection of Persons Employed in Construction and Demolition Work, as amended, except as the board may otherwise provide in this Part (rule) or in a resolution of approval of a specific scaffold or type thereof'.

     (b)   Maintenance and inspection requirements.   (1)   The owner of the scaffold shall establish and maintain a log showing inspection and maintenance work performed on the scaffold. The maintenance schedule and log sheet, recorded on forms furnished by the commissioner, shall be available at the site for use by the commissioner or his authorized representative.

     (2)   Prior to being put into operation on any day, the scaffold shall be subjected to a preliminary inspection and test to assure its safe condition. Results of this inspection shall be noted in the log. This inspection shall be performed by the foreman or other responsible person trained in the use and operation of the scaffold.

     (3)   Upon discovery of any substantial defect or abnormal condition in the scaffold or any part thereof, the scaffold shall be placed out of operation until such time as the abnormality or defect has been corrected and the scaffold restored to its normal condition.

     (c)   Suspended scaffolds--75 feet or more.   Every suspended scaffold so used including both manually or power operated types shall be approved if it is or is intended to be suspended from any point which has an elevation 75 feet or more above the nearest street or ground surface.

     (d)   Suspended scaffolds--not exceeding 75 feet; lifelines.   (1)   Every scaffold including both manually and power operated types which is suspended or is intended to be suspended from any point not exceeding 75 feet in elevation above the nearest street or ground surface is required to be approved only in respect to any hoisting machine which may be used thereon, provided that all other components comply with Part (Rule No.) 23. A block and tackle is not construed to be a hoisting machine. Any part of such scaffold assembly and suspension which is not named or described in Part (Rule No.) 23 is required to be approved pursuant to section 23.26 of said Part (rule).

     (2)   Each person working on such a suspended scaffold shall be provided with and shall use an approved safety belt. Each belt shall have its own lifeline, which shall consist of a hanging line and a tail line. The tail line shall be of minimum practical length and shall be attached to the hanging line by an approved special device to allow vertical adjustment of the point of attachment. The lifeline shall be securely attached to a sufficient anchorage.
Note:    See section 23.30 of Industrial Code Part (Rule No.) 23.   back
Historical Note
Sec. amds. filed: Feb. 18, 1964; Sept. 1, 1966 to be eff. Oct. 1, 1966. New sec. substituted.

§ 21.10 Authorized installation of anchors.

     (a)   Fastenings.   (1)   Anchor fastenings, except nuts, reinforcing plates and washers which are protected from the weather, shall be of the same metal as the anchor.

     (2)   Every fastening bolt or machine screw shall be machined from bar stock or hot forged. It shall have at least three-sixteenths inch of unthreaded length under the head and threads shall be cut.

     (3)   Every reinforcing plate shall be of steel and shall be cleaned and painted with at least one coat of corrosion resistant paint before installation.

     (4)   Nuts and machine screws shall be screwed tight without producing excessive stress.

     (5)   To prevent turning, loosening, or backing off, threads shall be peened close to the nut or plate or in lieu thereof, heavy lockwashers, firm locknuts or other positive means of retaining the finished position of threaded parts may be provided.

     (b)   Installation in pairs.   (1)   Anchors shall be installed so as to be usable in pairs from a position on the sill from which the cleaning is done and with each terminal of the safety belt attached to a separate anchor.

     (2)   One anchor shall be installed at each side of a window which may be, and is to be cleaned by the authorized method of working from the sill or ledge, so that each window has its own pair of anchors, except: where three double-hung windows with two separating mullions are set in one wall opening and the outer sash openings are less than 21 inches in width, anchors need not be installed at the outer sides of the outer windows.

     (c)   Height above sill.   Anchors shall be between 42 and 51 inches above the sill or ledge.

     (d)   Terminal space.   Each anchor shall be located so as to permit easy attachment and removal of a terminal and free play of the terminal when attached.

     (e)   Accessibility from inside.   Anchors shall be located so as to permit easy attachment of a terminal to either anchor without extending more than one arm beyond the sash opening.

     (f)   Wooden frames.   (1)   Anchors shall be attached to wood or metal covered wood window frames or mullions by bolts not less than three-eighths inch in diameter which pass through the entire window frame or mullion by holes not more than seven-sixteenths inch in diameter drilled through a solid section, such as a pulley stile or equivalent, of the frame or mullion.

     (2)   Bolts shall be securely fastened by a nut and washer.

     (3)   The outside diameter of such washer shall be at least twice the diameter of the bolt hole.

     (4)   Notwithstanding any other provision of this Part, the ends of such bolts shall be peened to prevent loosening or removal of the nuts.

     (5)   The back face of anchors for installation in wood windows, frames or mullions shall be provided with at least two sharp lugs or equivalent means to prevent turning of anchor after installation.

     (6)   Such installations shall be made only where frames are securely attached to the building.

     (g)   Installation of masonry type anchors.   (1)   Hereafter masonry type anchors shall not be installed in existing masonry or concrete walls, nor in any poured concrete. Such anchors shall be installed only in new walls of masonry unit construction.

     (2)   No such anchor shall be installed unless it is shaped to build into the joints between the masonry units being used.

     (3)   Each such anchor shall be firmly imbedded in the masonry and so placed that its flange bears flush against the masonry unit.

     (h)   Installation on hollow metal window frames.   (1)   Frame requirements.  Anchors shall not be installed on hollow metal window frames more than 10 feet in height unless such frames are approved. All other such frames shall meet the following specifications.

     (i)   Hollow metal window frames shall be of steel, aluminum or bronze. If made of any type of steel, the minimum thickness of the metal shall be 0.025 inch and its minimum ultimate tensile strength shall be 60,000 psi.

     (ii)   If made of aluminum, they shall be made of extruded aluminum alloy, type 6063 T5, or equivalent, and the minimum thickness of the metal shall be 0.062 inch.

     (iii)   If made of bronze, they shall be made of extruded architectural bronze, type Copper Alloy No. 385 as designated by the Copper and Brass Research Association, or its equivalent, and the minimum thickness of the metal shall be 0.078 inch.

     (2)   Attachment of anchors to hollow metal frames.  (i)   At least two bolts or machine screws not less than three-eighths inch in diameter and of proper length shall pass through the frame and through the middle of a steel reinforcing plate placed on the inside of the frame.

     (ii)   Provision shall also be made by means of adequate stiffeners to transmit the force of any load placed on the window anchors to the full cross section or depth of the jamb or mullion.

     (iii)   Bolts shall be secured by means of nuts and lock washers.

     (iv)   If bolts are not used, the reinforcing plate shall be tapped to receive the machine screws, which shall be screwed through the plate with at least one complete thread protruding.

     (v)   In installations made after February 25, 1964, a lock washer shall be provided under the head of the machine screw.

     (vi)   Reinforcing plates shall be at least five-sixteenths inch thick and three-quarters inch wide.

     (vii)   When used with steel window frames reinforcing plates shall be at least 12 inches long if the frame metal thickness is less than 0.062 inch and at least six inches long if the frame metal thickness is 0.062 inch or more.

     (viii)   Aluminum and bronze window frames shall have reinforcing plates at least 12 inches long.

     (3)   Existing installations on hollow metal frames.  Installations of approved anchors made before February 25, 1964, on frames of ferrous metal shall be in accordance with the provisions of former Industrial Code Rule No. 21 which were in effect at the time of installation. Such installations on sound and substantial frames of aluminum at least 0.062 inch thick or bronze at least 0.078 inch thick, if made in accordance with the provisions of former Industrial Code Rule No. 21 relating to installations on frames of ferrous metal which were in effect at the time of installation, are hereby authorized.

     (i)   Installation on solid metal window frames.   (1)   Anchors shall be attached to solid metal frames by at least two bolts or machine screws not less than three-eighths inch in diameter which shall be of proper length and shall pass through the frame.

     (2)   Bolts shall be secured on the inside by nuts and lock washers.

     (3)   If bolts are not used, the frame shall be tapped its entire thickness and the machine screws shall be screwed through the frame with at least one complete thread protruding.

     (4)   In such instances the thickness of the frame shall afford at least five-sixteenths inch length of threaded hole or a tapped reinforcing plate shall be used as for hollow metal frames, and in installations made after February 25, 1964, a lock washer shall be provided under the head of the machine screw.

     (j)   Attachment of frames to wall construction.   Window frames shall be so designed, constructed and installed as to be securely fastened to the wall construction.

     (k)   Firm installation required.   Every installation and its supporting structural features shall be firm and stable. Anchors and anchor fastenings shall be secured to prevent them from turning, backing off or becoming loose.

     (l)   Evidence of compliance.   In respect to the requirements of this Part regarding the metal used in or in connection with metal frame windows, whether hollow or solid, their internal construction, their installation in or attachment to a building structure and the attachment of anchors to them, the manufacturer, builder or installer, as the case may be, shall prepare a written and signed statement setting forth in detail the facts establishing that such frames and their installation are in accordance with the requirements of this Part and shall cause such statement to be filed with the commissioner. Upon the filing of such a certificate the commissioner may, if he finds it sufficient, accept it as presumptive evidence of the facts therein stated.   back

Historical Note
Subd. (a), par. (2) amd., filed Feb. 18, 1964 to be eff. Feb. 25, 1964. Substituted "machine" for "cap". Subd. (a), par. (4) amd., filed Feb. 18, 1964 to be eff. Feb. 25, 1964. Substituted "machine" for "cap". Subd. (f) amd., filed Feb. 18, 1964 to be eff. Feb. 25, 1964. New subd. substituted. Subd. (h) amd., filed Feb. 18, 1964 to be eff. Feb. 25, 1964. New subd. substituted. Subd. (i) amd., filed Feb. 18, 1964 to be eff Feb. 25, 1964. New subd. substituted. Subd. (j) amd., filed Feb. 18, 1964 to be eff. Feb. 25, 1964. New subd. added, former subd. (j) relettered (k). Subd. (k) added by relettering and amending of former subd. (j), filed Feb. 18, 1964 to be eff. Feb. 25, 1964. Inserted "required.* * * stable." Subd. (l) added, filed Feb. 18, 1964 to be eff. Feb. 25, 1964.

§ 21.11 Specifications for safety belts.

     (a)   Approval and identification.   Safety belts and terminals shall be approved by the board and shall bear the mark of approval and such other means of identification as may be proscribed by the board.

     (b)   Materials for straps.   All material used in the manufacture of safety belt straps shall conform to the specifications and requirements of the approval resolution and only first quality material shall be used. Fabric which may be affected by mildew shall be treated with a nonacid and noncorrosive antimildew agent.

     (c)   Stitching and binding.   Stitching shall be done with hot waxed, best quality No. 5 linen thread or heavier, and must be lock stitching. Fabric ends shall be bound or dipped to prevent unraveling.

     (d)   Reinforcing.   Where straps are attached to terminals, leather wearing pads at least three sixteenths inch thick shall be provided for wear.

     (e)   Type and dimensions of fittings and terminals.   All belt terminals and all fittings that are subject to stress during use shall be drop forged. Dimensions of terminals shall conform to the dimensions shown in Figure 1:

image of a belt terminal
back

     (f)   Safety catch.   An approved safety catch shall be included as part of each terminal.

     (g)   Material specifications for metal fittings.   Safety belt terminals and other metal fittings subject to stress during use shall be of steel or any of the alloys specified for anchors in subdivision (b) of section 21.13.

     (h)   Manufacture of metal fittings.   Fittings that are made of alloys and that may be subject to stress during use shall be manufactured in accordance with the specifications herein required for the manufacture of anchors. The finished product shall be free of imperfections and all concerns shall be properly filleted or rounded.   back

§ 21.12 Test requirements for safety belts.

     (a)   Required test performance.   Prior to approval by the board of a safety belt, a specimen shall be tested by a testing laboratory approved by the board. The complete assembly of the safety belt shall be capable of holding a 250 pound weight falling free for a distance of four feet.

     (b)   Test procedure.   In performing the test, the test weight shall be a rigid object 36 inches in girth and having a weight of 250 pounds. It shall be held by the waist band and secured by the belt buckle, in the same manner as when the belt is worn by a window cleaner. One belt terminal shall be attached to a rigid anchor and the test weight shall fall free for a distance of four feet from a point in vertical alignment with the point of suspension.

     (c)   Test report.   Two copies of the complete report by the testing laboratory, including a detailed description of the test specimen, the test procedure and test results shall be submitted to the board by the laboratory.

     (d)   Test specimen.   A cleaner shall not be suffered or permitted to use a safety belt or any part thereof which has been used as a test specimen.   back

§ 21.13 Specifications for anchors and anchor fastenings.

     (a)   Required type.   Anchors and their fastenings shall be approved and the anchor shall bear the mark of approval prescribed by the board. They shall be machined from bar stock or forged as hereinafter set forth. Anchors shall conform with the dimensions as shown in Figures 2 and 3 below:

image of a single head anchor
back
Image of a Dual Head Anchor
back

     (b)   Required material.   Anchors and anchor fastenings except reinforcing plates shall be of alloys as follows:

     (1)   Items which are to be forged shall be made of the following alloys:

Nickel-copper alloy, ASTM designation B127-49T containing
Nickel Max. Per cent 63.0 to 70.0
Iron “          “ 2.5
Aluminum “          “ 0.5
Manganese “          “ 1.25
Carbon “          “ 0.3
Silicon “          “ 0.5
Sulfur “          “ 0.02
Copper “          “ remainder; or
Copper nickel alloy, ASTM designation BI22-54T, alloy No. 5
containing
Nickel Max. Per cent 29.0 to 33.0
Iron “          “ 0.7
Manganese “          “ 1.0
Lead “          “ 0.05
Zinc “          “ 1.0
Copper Min. Per cent 65.0; or
back
Stainless steel AISI type No. 304 containing          
Carbon           Max. Per cent 0.08
Manganese “          “ 2.0
Silicon “          “ 1.0
Phosphorus “          “ 0.04
Sulfur “          “ 0.03
Chromium Per cent 18.0 to 20.0
Nickel 8.0 to 11.0; or
          
Stainless steel A1SI type No. 316 containing          
Carbon           Max. Per cent 0.1
Manganese “          “           2.0
Silicon “          “ 1.0
Phosphorus “          “ 0.04
Sulfur “          “ 0.03
Chromium Per cent 16.0 to 18.0
Nickel 10.0 to 14.0
Molybdenum 2.0 to 3.0
back
     (2)   Machined fastenings and other items shall be of the same material as the forgings to which they are attached except that machined parts of stainless steel may be made from AISI type 303 and machined parts of nickel-copper alloy may be made from Class B material having a sulfur content of not more than 0.5 per cent.

     (c)   Required fabrication.   (1)   Anchors and anchor fastenings shall be machined from bar stock, or forged and treated as specified below:

FORGING
Material      Preheat
temp. (° F.)
Start forging     
at (° F. )
Finish forging     
at(°F.)
Anneal after     
forging
Range of BHN
hardness after
forging and
annealing
Ni-Cu None Not over
2150
Not below
1700
5 to 10 min.
at 1600°F.
110 to 140
BHN
Cu-Ni None 1900 1600 Approx. 5
min. at 1700
to 1750°F.
150 to 170
BHN
304 to 1500
slowly
2050 to 2200 1600 to 1700 15 min. 1950
to 2050°F.
150 to 160
BHN
316 to 1500
slowly
2100 to 2200 1600 to 1700 15 min. at
1950 to
2050°F.
150 to 170
BHN
back
     (2)   The heating for forging of nickel-copper and copper-nickel alloys shall be done in an atmosphere that is essentially sulfur-free. The fuel used shall contain not more than 0.5 per cent of sulfur. Such atmosphere shall be slightly reducing with a carbon-monoxide content of two per cent or more. After forging and annealing, each anchor shall be pickled to remove scale and discoloration. No cold working of anchors other than drilling, spot-facing, reaming, boring, broaching, countersinking, threading, and grinding is permitted.

     (d)   Finish.   The finished anchor shall be free of imperfections and all corners shall be properly filleted or rounded. Where screw fastenings are used, the surface shall be spot-faced to receive the lock washer under the screw head.

     (e)   Tests of finished forgings.   (1)   If and when the commissioner so requires, the owner of finished forgings of anchors and anchor fastenings shall select such number of forgings from each lot as the commissioner may require for testing. The commissioner may require such test specimens to be subjected by the owner to the BHN hardness test and a nondestructive test such as the fluorescent penetrant test.

     (2)   The manufacturer of such anchor forgings shall cause at least one per cent, but not less than two forgings, of each lot to be subjected to an impact test as follows:

     The anchor shall be attached to a rigid anchorage. A 250 pound solid and compact weight of iron or lead shall be suspended from the anchor by means of an approved belt terminal and a 6-37 strand three-eighths inch plow steel wire rope. The test rope shall be not more than six feet long and rope connections shall be by thimble and splice or proper size rope clamps. The test weight shall be hoisted to a point in vertical alignment with the point of suspension and allowed to fall free a distance of four feet.

     (3)   Such manufacturer shall notify the commissioner of such impact tests in advance.

     (4)   If any specimen from a lot fails to withstand the impact test, the lot from which it was taken shall be either re-treated and retested or scrapped. If any specimens from a re-treated lot fails to withstand such test, the lot shall be rejected and scrapped.

     (f)   Screw thread.   Fastening screws and bolts shall have an untreated portion under the head not less than three-sixteenths inch long. Threads shall be cut.   back

Historical Note
Sec. amd., filed Feb. 18, 1964 to be eff. Feb. 25, 1964. Substituted "sulfur" for "sulphur" wherever it appears.

§ 21.14 Existing installations of approved anchors.

     No provision of this Part as amended effective February 25, 1964, requires or is intended to require alteration of any such installation existing on that date which complies with former Industrial Code Rule No. 21 as the same was in effect when the installation was made.   back

Historical Note
Sec. amd., filed Feb. 18, 1964 to be eff. Feb. 25, 1964. New sec. substituted.

§ 21.l5 Approvals and variations.

     No provision of this Part as presently amended affects or is intended to affect any resolution of approval or variation adopted by the board prior to February 25, 1964. Each such resolution is continued until further action by the board.   back

Historical Note
Sec. amd., filed Feb. 18, 1964 to be eff. Feb. 25, 1964. Substituted "February 25, 1964" for "December 1, 1955".

§ 21.l6 Severability.

     If any provision of this Part or the application thereof to any person or circumstances is held invalid, such invalidity shall not affect other provisions or applications of this Part which can be given effect without the invalid provision or application, and to this end the provisions of this Part are declared to be severable.   back

Thanks for the feedback! It will help us improve your experience.