8/16/2023 0 Comments Trestle scaffolding definition![]() ![]() Outrigger beams must be restrained to prevent movement.Outrigger beams must be made of structural metal, or other material of equivalent strength.Scaffold support devices such as cornice hooks, roof hooks, roof irons, parapet clamps, or similar devices must be made of steel, wrought iron, or materials of equivalent strength.Scaffold components made of dissimilar metals must not be used together unless a competent person has determined that galvanic action (rust) will not reduce the strength of any component below OSHA standards.Scaffold components manufactured by different manufacturers are not allowed to be modified to make them fit together, unless a competent person determines that the resulting scaffold is structurally sound.Scaffold components manufactured by different manufacturers must not be intermixed, unless they fit together without being forced, and the scaffold's structural integrity is maintained.Scaffold with Improvised Components Fails Worker Dies How can you tell if these components possess sufficient structural integrity? This is the same jury-rigged scaffold as in Figure 4. Scaffolds shall be altered only under the supervision and direction of a competent person.No more than three employees should occupy suspension scaffolds designed for a working load of 750 pounds (non-mandatory).No more than two employees should occupy suspension scaffolds designed for a working load of 500 pounds (non-mandatory).Be secured against movement by tiebacks installed at right angles to the face of the building or structure ( 5 & 6), or by opposing angle tiebacks installed and secured to a structurally sound point of anchorage (structurally sound points of anchorage include structural members, but not vents, electrical conduit, or standpipes and other piping systems). ![]()
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