hiltrecord.blogg.se - Building a scaffold tower

#BUILDING A SCAFFOLD TOWER FULL#
#BUILDING A SCAFFOLD TOWER PORTABLE#

Each toprail or equivalent member of a guardrail system must be able to withstand a force of at least 200 pounds applied in any downward or horizontal direction, at any point along its top edge.

Walkways located within a scaffold must have guardrail systems installed within 9½ inches of and along at least one side of the walkway.

Guardrail systems must be installed along all open sides and ends of platforms, and must be in place before the scaffold is released for use by employees other than erection/dismantling crews.

Įmployee is Pulled off Scaffold, Suffers Injuries.

When horizontal lifelines are used, they are to be secured to two or more structural members of the scaffold.

It is dangerous and therefore impermissible for two or more vertical lifelines to be attached to each other, or to the same point of anchorage.

Safe points of anchorage include structural members of buildings, but not standpipes, vents, electrical conduit, etc., which may give way under the force of a fall.

When vertical lifelines are used, they must be fastened to a fixed safe point of anchorage, independent of the scaffold, and be protected from sharp edges and abrasion.

502(d), personal fall-arrest systems used on scaffolds are to be attached by lanyard to a vertical lifeline, horizontal lifeline, or scaffold structural member. In addition to meeting the requirements of.

#BUILDING A SCAFFOLD TOWER FULL#

Note that the worker is wearing a safety belt, whereas the new standard requires a full body harness. An example of a lanyard attached to a vertical lifeline. Uniform tread depth, within ¼-inch, for each flight of stairs.Greater variations in riser height are allowed for the top and bottom steps of the entire system (not for each flight of stairs). Uniform riser height, within ¼-inch, for each flight of stairs.Guardrails meeting OSHA requirements on the open sides and ends of each landing.Stairways installed between 40 degrees and 60 degrees from the horizontal.Slip-resistant surfaces on treads and landings.A scaffold stairway width of at least 18 inches between stair rails.A landing platform at least 18 inches wide by 18 inches long at each level.A distance of no less than 28 inches and no more than 37 inches from the upper surface of the stair rail to the forward edge of the tread, in line with the face of the riser.A space of at least 3 inches between handrails, or stair rails used as handrails, and other objects.Ends of stair rails and handrails constructed so that they do not constitute a projection hazard.Stair rails and handrails surfaced to prevent punctures or lacerations to employees, and to prevent snagging of clothing.Sufficient handhold on handrails, and toprails serving as handrails, for employees grasping them to avoid falling.A toprail of each stair rail system capable of serving as a handrail, unless a separate handrail is provided.A stair rail consisting of a toprail and a midrail on each side of the stairway.Stair towers (scaffold stairway/towers) must have (Figure 7): Have rest platforms provided at a maximum of 35 foot vertical intervals.Have rungs which are uniformly spaced and a length of at least 8 inches, with a maximum space between rungs of 16¾ inches.

Not be used as work platforms when rungs are less than 11½ inches in length, unless each affected employee uses appropriate fall protection.

Be specifically designed and constructed for use as ladder rungs.

Integral (built-in) scaffold access frames must: Stair tower with stair rail, including toprail and midrail.

Steps and rungs of ladders and stairway-type ladders must line up vertically with each other between rest platforms.

Have slip-resistant treads on all steps and landings.

Have a minimum step width of 16 inches, except for mobile scaffold stairway-type ladders, which shall have a minimum step width of 11½ inches, and.

Have rest platforms at maximum vertical intervals of 12 feet,.

Be positioned so that their bottom step is not more than 24 inches above the scaffold supporting level,.Have rest platforms provided at a maximum of 35-foot vertical intervals.Have minimum rung length of 11½ inches.Have uniform spacing between rungs of a maximum 16¾ inches.Be positioned so that their bottom rung is not more than 24 inches above the scaffold supporting level.Hook-on and attachable ladder rungs must:.Hook-on and attachable ladders must be specifically designed for use with the type of scaffold on which they are used.Portable, hook-on, and attachable ladders must be positioned so as not to tip the scaffold.

#BUILDING A SCAFFOLD TOWER PORTABLE#

Example of a frame scaffold with portable ladder for access.