Appendix D to Article 6
8 CA ADC Div. 1 Ch. 4 Subch. 7 Grp. 1 Art. 6 App. DBarclays Official California Code of Regulations
Barclays California Code of Regulations
Title 8. Industrial Relations
Division 1. Department of Industrial Relations
Chapter 4. Division of Industrial Safety
Subchapter 7. General Industry Safety Orders
Group 1. General Physical Conditions and Structures
Article 6. Powered Platforms and Equipment for Building Maintenance
8 CCR Div. 1 Ch. 4 Subch. 7 Grp. 1 Art. 6 App. D
Appendix D to Article 6
Existing Installations
(Mandatory)
Use of the Appendix
Appendix D sets out the mandatory building and equipment requirements for applicable permanent installations completed after September 29, 1974, and no later than July 1, 1993 which are exempt from Sections 3292(a), (b)(1), (c), 3293, 3294, and 3295 of Article 6. The requirements in Appendix D are essentially the same as unrevised building and equipment provisions which previously were designated Article 6 and which were effective on July 16, 1976. (Title 24, Part 2, Section 2-8510(a).)
Note: All existing installations subject to this appendix shall also comply with Sections 3296, 3297, 3298, 3299 and Appendix C of Article 6.
Angulated Roping. A system of platform suspension in which the upper wire rope sheaves or suspension points are closer to the plane of the building face than the corresponding attachment points on the platform, thus causing the platform to press against the face of the building during its vertical travel.
ANSI. American National Standards Institute.
Babbitted Fastenings. The method of providing wire rope attachments in which the ends of the wire strands are bent back and are held in a tapered socket by means of poured molten babbitt metal.
Brake-Disc Type. A brake in which the holding effect is obtained by frictional resistance between one or more faces of discs keyed to the rotating member to be held and fixed discs keyed to the stationary or housing member (pressure between the discs being applied axially).
Brake-Self-Energizing Band Type. An essentially unidirectional brake in which the holding effect is obtained by the snubbing action of a flexible band wrapped about a cylindrical wheel or drum affixed to the rotating member to be held, the connections and linkages being so arranged that the motion of the brake wheel or drum will act to increase the tension or holding force of the band.
Brake-Shoe Type. A brake in which the holding effect is obtained by applying the direct pressure of two or more segmental friction elements held to a stationary member against a cylindrical wheel or drum affixed to the rotating member to be held.
Building Face Rollers. A specialized form of guide roller designed to contact a portion of the outer face or wall structure of the building, and to assist in stabilizing the operators' platform during vertical travel.
Continuous Pressure. Operation by means of buttons or switches, any one of which may be used to control the movement of the working platform or roof car, only as long as the button or switch is manually maintained in the actuating position.
Control. A system governing starting, stopping, direction, acceleration, speed, and retardation of moving members.
Controller. A device or group of devices, usually contained in a single enclosure, which serves to control in some predetermined manner the apparatus to which it is connected.
Electrical Ground. A conducting connection between an electrical circuit or equipment and the earth, or some conducting body which serves in place of the earth.
Guide Roller. A rotating, bearing-mounted, generally cylindrical member, operating separately or as part of a guide shoe assembly, attached to the platform, and providing rolling contact with building guideways, or other building contact members.
Guide Shoe. An assembly of rollers, slide members, or the equivalent, attached as a unit to the operators' platform, and designed to engage with the building members provided for the vertical guidance of the operators' platform.
Interlock. A device actuated by the operation of some other device with which it is directly associated, to govern succeeding operations of the same or allied devices.
Operating Device. A pushbutton, lever, or other manual device used to actuate a control.
Powered Platform. Equipment to provide access to the exterior of a building for maintenance, consisting of a suspended power-operated working platform, a roof car, or other suspension means, and the requisite operating and control devices.
Rated Load. The combined weight of employees, tools, equipment, and other material which the working platform is designed and installed to lift.
Relay, Direction. An electrically energized contactor responsive to an initiating control circuit, which in turn causes a moving member to travel in a particular direction.
Relay, Potential for Vertical Travel. An electrically energized contactor responsive to initiating control circuit, which in turn controls the operation of a moving member in both directions. This relay usually operates in conjunction with direction relays, as covered under the definition “relay, direction.”
Roof Car. A structure for the suspension of a working platform. providing for its horizontal movement to working positions.
Roof-Powered Platform. A powered platform having the raising and lowering mechanism located on a roof car.
Self-Powered Platform. A powered platform having the raising and lowering mechanism located on the working platform.
Traveling Cable. A cable made up of electrical or communication conductors or both, and providing electrical connection between the working platform and the roof car or other fixed point.
Weatherproof. Equipment so constructed or protected that exposure to the weather will not interfere with its proper operation.
Working Platform. The suspended structure arranged for vertical travel which provides access to the exterior of the building or structure.
Yield Point. The stress at which the material exhibits a permanent set of 0.2 percent.
Zinced Fastenings. The method of providing wire rope attachments in which the splayed or fanned wire ends are held in a tapered socket by means of poured molten zinc. (Title 24, Part 2, Section 2-8510(b).)
(1) Design requirements. All powered platform installations for exterior building maintenance completed as of September 29, 1974, but no later than July 1, 1993, shall meet all of the design, construction and installation requirements of Part II and III of the “American National Standard Safety Requirements for Powered Platforms for Exterior Building Maintenance. ANSI A120.1-1970”, which is hereby incorporated by reference, and of this appendix. All powered platform installations installed prior to September 29, 1974 shall be maintained as required by Appendix D. References shall be made to appropriate parts of ANSI A120.1-1970 for detail specifications for equipment and special installations. (Title 24, Part 2, Section 2- 8511(b).)
(2) Limitation. The requirements of this appendix apply only to electric powered platforms. It is not the intent of the appendix to prohibit the use of other types of power. Installation of powered platforms using other types of power is permitted, provided such platforms have adequate protective devices for the type of power used, and otherwise provided for reasonable safety of life and limb to users of equipment and to others who may be exposed. (Title 24, Part 2, Section 2-8511(c).)
(B) Powered platforms designated as Type F shall meet all the requirements in Part II of the ANSI A 120.1-1970. American National Standard Safety Requirements for Powered Platforms for Exterior Building Maintenance, which is hereby incorporated by reference. A basic requirement of Type F equipment is that the work platform is suspended by at least four wire ropes and designed so that failure of any one wire rope will not substantially alter the normal position of the working platform. Another basic requirement of Type F equipment is that only one layer of hoisting rope is permitted on winding drums. Type F powered platforms may be either roof-powered or self-powered. (Title 24, Part 2, Section 2-8511(d)2.)
(C) Powered platforms designated as Type T shall meet all the requirements in Part III of ANSI A120.1-1970, American National Standard Safety Requirements for Powered Platforms for Exterior Building Maintenance except for safety belts and safety lines, which are provided for in subparagraph (e) of this appendix. A basic requirement of Type T equipment is that the working platform is suspended by at least two wire ropes. Failure of one wire rope would not permit the working platform to fall to the ground, but would upset its normal position. The employer shall require employees working on Type T equipment to wear a safety belt or body harness as required by paragraph (e) of this appendix. Type T powered platforms may be either roof-lowered or self-powered. (Title 24. Part 2. Section 2-8511(d)3.)
(D) The requirements of this section apply to powered platforms with winding drum type hoisting machines. It is not the intent of this section to prohibit powered platforms using other types of hoisting machines, traction drum hoisting machines, air powered machines, hydraulic powered machines, and internal combustion machines. Installation of powered platforms with other types of hoisting machines is permitted, provided adequate protective devices are used, and provided reasonable safety of life and limb to users of the equipment and to others who may be exposed is assured. (Title 24, Part 2, Section 2-8511-(c)2.)
(E)1. The operating device of a power-operated roof car for traversing shall be located on the roof car, the working platform, or both, and shall be of the continuous pressure weatherproof electric type. If more than one operating device is provided, they shall be so arranged that traversing is possible only for one operating device at a time.
(B) The roof car and its anchorages shall be capable of resisting accidental over-tensioning of the wire ropes suspending the working platform and this calculated value shall include the effect of one and one-half times the value. For this calculation, the simultaneous effect of one-half wind load shall be included, and the design stresses shall not exceed those referred to in subparagraph (b)(1) of this appendix.
(4) Access to the Roof Car. Safe access to the roof car and from the roof car to the working platform shall be provided. If the access to the roof car at any point of its travel is not over the roof area or where otherwise necessary for safety self- closing, self-locking gates shall be provided. Standard guardrails shall meet the provisions of Section 3209. (Title 24, Part 2, Section 2-8512(d).)
(5) Means for Maintenance, Repair, and Storage. Means shall be provided to run the roof car away from the roof perimeter, where necessary, and to provide a safe area for maintenance, repairs, and storage, Provisions shall be made to secure the machine in the stored position. For stored machines subject to wind forces, see special design and anchorage requirements for “wind forces” in Part II, Section 10.5.1.1 of ANSI A120-1-1970, American National Standard Safety Requirements for Powered Platforms for Exterior Building Maintenance, in which is hereby incorporated by reference. (Title 24, Part 2, Section 2-8512(e).)
(6) General Requirements for Working Platforms. The working platform shall be of girder or truss construction and shall be adequate to support its rated load under any position of loading, and comply with the provisions set forth in Section 10 of ANSI A120.1-1970, American National Standard Safety Requirements for Powered Platforms for Exterior Building Maintenance, which is hereby incorporated by reference.
(7) Load Rating Plate. Each working platform shall bear a manufacturer's load rating plate, conspicuously posted, stating the maximum permissible rated load. Load rating plates shall be made of noncorrosive material and shall have letters and figures stamped, etched, or cast on the surface. The minimum height of the letters and figures shall be one-fourth inch.
(9) Guardrails. Working platforms shall be furnished with permanent guard rails not less than 36 inches high, and not more than 42 inches high at the front (building side). At the rear, and on the sides, the rail shall not be less than 42 inches high. An intermediate guardrail shall be provided around the entire platform between the top guardrail and the toeboard.
(11) Open Spaces Between Guardrails and Toeboards. The spaces between the intermediate guardrail and platform toeboard on the building side of the working platform, and between the top guardrail and the toeboard on other sides of the platform, shall be filled with metallic mesh or similar material that will reject a ball one inch in diameter. The installed mesh shall be capable of withstanding a load of 100 pounds applied horizontally over any area of 144 square inches. If the space between the platform and the building face does not exceed eight inches, and the platform is restrained by guides, the mesh may be omitted on the front side.
(A) In addition, on roof-powered platforms, an emergency electric operating device shall be provided near the hoisting machine for use in the event of failure of the normal operating device for the working platform, or failure of the traveling cable system. The emergency operating device shall be mounted in a locked compartment and shall have a legend mounted thereon reading: “For Emergency Operation Only. Establish Communication With Personnel on Working Platform Before Use.”
(16) Manual Cranking for Emergency Operation. Emergency operation of the main drive machine may be provided to allow manual cranking. This Provision for manual operation shall be designed so that not more than two persons will be required to perform this operation. The access to this provision shall include a means to automatically make the machine inoperative electrically while under the emergency manual operation. The design shall be such that the emergency brake is operative at or below governor tripping speed during manual operation.
(B) The minimum grade of the robe wire shall be improved plow steel. Ropes shall be fabricated of drawn galvanized or bright wire. Drawn galvanized wire rope shall be fabricated of individual wires on which the zinc coating has been applied at an intermediate size, and the wire then drawn to finished size and to the same tolerances and with the same mechanical properties as for uncoated wire of equal grade.
F = S x N/W
Where
S = Manufacturer's rated breaking strength of one robe.
N = Number of ropes under load.
W = Maximum static load on all ropes with the platform and its rated load at any point of its travel.
(F) Electrical receptacles located on the roof or other exterior location shall be of a weatherproof type and shall be located so as not to be subject to contact with water or accumulated snow. The receptacles shall be grounded and the electric cable shall include a grounding conductor. The receptacle and plug shall be a type designed to avoid hazard to persons inserting or withdrawing the plug. Provision shall be made to prevent application of cable strain directly to the plug and receptacle.
(G) Electric runway conductor systems shall be of the type designed for use in exterior locations and shall be located so as not to be subject to contact with water or accumulated snow. The conductors, collectors, and disconnecting means shall conform to the requirements of the California Code of Regulations, Title 8, Electrical Safety Orders. A grounded conductor shall parallel the power conductors and be so connected that it cannot be opened by the disconnecting means. The system shall be designed to avoid hazard to persons in the area.
(L) An automatic overload device shall be provided to cut off the electrical power to the circuit in all hoisting motors for travel in the up direction, should the load applied to the hoisting ropes at either end of the working platform exceed 125 percent of its normal tension with rated load, as shown on the manufacturer's data plate on the working platform.
(A) The reguirements of subparagraphs (c)(22)(A) through (F) of this appendix shall apply to Type T powered platforms. “Circuit protection limitation,” “powered platform electrical service system,” all operating services and control eguipment shall comply with the specifications contained in the California Code of Regulations, Title 8, Electrical Safety Orders.
(B) For electrical protective devices, the requirements of subparagraphs (c)(22)(G) through (P) shall apply to Type T platforms. Requirements for the “circuit potential limitation” shall be in accordance with the specifications contained in the California Code of Regulations, Title 8, Electrical Safety Orders.
(1) Each employee on the working platform of Type T powered platforms shall be provided with and required to use a body harness or safety belt attached to a vertical or horizontal safety line, If a horizontal safety line (dog line) is used the length of the lanyard shall not exceed 5 feet and shall employ an energy absorbing device acceptable to the Division.
Credits
Note: Authority cited: Section 142.3, Labor Code. Reference: Section 142.3, Labor Code; and Section 18943(c), Health and Safety Code.
This database is current through 5/24/24 Register 2024, No. 21.
Cal. Admin. Code tit. 8, Div. 1 Ch. 4 Subch. 7 Grp. 1 Art. 6 App. D, 8 CA ADC Div. 1 Ch. 4 Subch. 7 Grp. 1 Art. 6 App. D
End of Document |