i. WEAR FALL PREVENTION EQUIPMENT when rigging on exposed roofs or floors.
ii. ROOF HOOKS, PARAPET CLAMPS, OUTRIGGER BEAMS OR OTHER SUPPORTING DEVICES must be capable of supporting the hoist machine rated load with a factor of safety of 4.
iii. VERIFY THAT THE BUILDING OR STRUCTURE WILL SUPPORT the suspended loads with a factor of safety of 4. iv. ALL OVERHEAD RIGGING must be secured from movement in any direction.
v. COUNTERWEIGHTS USED WITH OUTRIGGER BEAMS must be of a non-flowable material and must be secured to the beam to prevent accidental displacement.
vi. OUTRIGGER BEAMS THAT DO NOT USE
COUNTERWEIGHTS must be installed and secured on
the roof structure with devices specifically designed for
that purpose. Direct connections shall be evaluated by a competent person.
vii. TIE BACK ALL TRANSPORTABLE RIGGING DEVICES. Tiebacks shall be equivalent in strength to suspension ropes. viii. INSTALL TIEBACKS AT RIGHT ANGLES TO THE FACE OF THE BUILDING and secure, without slack, to a structurally sound portion of the structure, capable of supporting the hoisting machine rated load with a safety factor of 4. IN THE EVENT THAT TIEBACKS CANNOT BE INSTALLED AT RIGHT ANGLES, two tiebacks at opposing angles must be used to prevent movement.
ix. RIG AND USE HOISTING MACHINES DIRECTLY UNDER THEIR SUSPENSION POINTS.
b. WIRE ROPE AND HARDWARE:
i. USE ONLY WIRE ROPE AND ATTACHMENTS as specified by the hoisting machine manufacturer.
ii. ASSURE THAT WIRE ROPE IS LONG ENOUGH to reach to the lowest possible landing.
iii. CLEAN AND LUBRICATE WIRE ROPE in accordance with the wire rope manufacturer’s instructions.
iv. HANDLE WIRE ROPE WITH CARE.
v. COIL AND UNCOIL WIRE ROPE in accordance with manufacturer’s instructions in order to avoid kinks or damage.
vi. TIGHTEN WIRE ROPE CLAMPS in accordance with the clamp manufacturer’s instructions.
vii. INSPECT WIRE ROPE IN ACCORDANCE WITH MANUFACTURER’S INSTRUCTIONS. DO NOT USE WIRE ROPE THAT IS KINKED, BIRDCAGED, CORRODED, UNDERSIZED OR DAMAGED IN ANY WAY. Do not expose wire rope to fire, undue heat, corrosive atmosphere, electricity, chemicals or damage by tool handling.
viii. USE THIMBLES AND SHACKLES AT ALL WIRE ROPE SUSPENSION TERMINATIONS.
ix. USE J-TYPE CLAMPS OR SWEDGE FITTINGS. Do not use U-bolts. Retighten J Clamps under load and retighten daily.
x. WIRE ROPES USED WITH TRACTION HOISTS MUST HAVE PREPARED ENDS. Follow manufacturer’s recommendations.
c. POWER SUPPLY FOR MOTORIZED EQUIPMENT:
i. GROUND ALL ELECTRICAL POWER SOURCES AND POWER CORD CONNECTIONS and protect them with circuit breakers.
ii. USE POWER CORDS OR AIR HOSES OF THE PROPER SIZE THAT ARE LONG ENOUGH for the job.
iii. POWER CORD OR AIR HOSE CONNECTIONS MUST BE RESTRAINED to prevent their separation.
iv. USE STRAIN RELIEF DEVICES TO ATTACH POWER CORDS OR AIR SUPPLY HOSES TO THE SUSPENDED SCAFFOLD to prevent them from falling.
v. PROTECT POWER CORDS OR AIR HOSES AT SHARP EDGES.
vi. USE GFI WITH POWER TOOLS.
d. FALL ARREST EQUIPMENT:
i. EACH PERSON ON A SUSPENDED SCAFFOLD must be attached to a separate fall arrest system unless the installation was specifically designed not to require one.
ii. EACH LIFELINE MUST BE FASTENED IN ACCORDANCE WITH MANUFACTURER’S INSTRUCTIONS to a separate anchorage capable of holding a minimum of 5000 pounds (2,268 kg).
iii. DO NOT WRAP LIFELINES AROUND STRUCTURAL MEMBERS unless lifelines are protected and a suitable anchorage connection
iv. PROTECT LIFELINES AT SHARP CORNERS to prevent chafing.
v. RIG FALL ARREST SYSTEMS to prevent free fall in excess of
6 ft (1.8 m).
vi. SUSPEND LIFELINES FREELY without contact with structural members or building façade.
vii. USE LIFELINES OF SIZE AND CONSTRUCTION that
are compatible with the rope grab use.
viii. ASSURE A PROPERLY ATTACHED ROPE GRAB IS INSTALLED ON EACH LIFELINE IN THE PROPER DIRECTION. Install in accordance with the manufacturer’s recommendations.
x. ONLY MOVE SUSPENDED SCAFFOLDS HORIZONTALLY WHEN NOT OCCUPIED.
xi. WHEN RIGGING FOR ANOTHER DROP assure sufficient wire rope is available before moving the suspended scaffold system horizontally. xii. WHEN WELDING FROM SUSPENDED SCAFFOLDS:
1. Assure platform is grounded to structure.
2. Insulate wire rope above and below the platform.
3. Insulate wire rope at suspension point and assure wire does not contact structure along its entire length.
4. Prevent the bitter end from touching the welding ground.
Since field conditions vary and are beyond the control of the SSFI
and the SIA, safe and proper use of suspended scaffolding is the sole responsibility of the user.
Reprinting of this publication does not imply approval
of product by the Institute or indicate membership in
Codes of Safe Practice are available in Spanish from the SSFI at SSFI.org