Each scaffold and scaffold component shall support without failure its own weight and at least 4 times the maximum intended load. Guardrail systems required when platform is 10 feet or more above a lower level. Planking: scaffold-grade lumber or manufactured planks, overlapping minimum 6 inches. Cross-bracing not acceptable as guardrails. Access: ladder, stair tower, or ramp — never climb cross-braces. Competent person must: inspect before each shift, supervise erection/dismantling, determine if conditions are safe. Scaffold erectors/dismantlers must be trained before working on scaffolds. Scaffolds must not be erected, moved, dismantled, or altered except under the supervision of a competent person. Fall protection: personal fall arrest or guardrails on all open sides. Scaffolding violations are consistently the #2 most-cited OSHA standard.