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FAQ | Overview | Standards | Glossary | Viewing/Printing Instructions | Credits     Suspended Scaffolds:   >>   Two-point (swing stage)     >>   Single-point Adjustable     >>   Catenary     >>   Multi-point Adjustable     >>   Interior Hung     >>   Needle Beam     >>   Multi-level     >>   Float (ship) Planking > Planking Quiz Either scaffold-grade or construction-grade lumber may be used on scaffolding platforms, as long as it meets OSHA standards. True    False All scaffold planking must be stamped "OSHA Approved." True    False You can't rely on a lumber grade stamp to tell if a plank is safe. True    False Splits in a plank do not affect its strength until they are at least 12-18 inches. True    False Unlike other lumber, scaffold-grade planks do not show checks and notches as they age. True    False Checks in lumber are splits that do not go all the way through the wood. True    False A scaffold plank that has been used as a mudsill should not be returned to service on a platform. True    False If paint, plaster, etc. have accumulated on one side of a scaffold plank, it should be turned over so as to present a clean work surface. True    False The longer the span of a scaffold plank, the greater the load it is able to carry. True    False A 10-foot scaffold plank is only allowed to deflect 2 inches, or 1/60th of its span. True    False

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