OSHA's requirements for elevated work platforms come from its walking-working-surfaces standard. According to OSHA, 29 CFR 1910.28(b)(1) requires fall protection wherever a platform's unprotected side or edge sits 4 feet or more above a lower level, and 29 CFR 1910.29(b)(1) sets the top-rail guardrail height at 42 inches (plus or minus 3 inches) above the walking surface, with a midrail required under 1910.29(b)(2)(i) and a toeboard at least 3.5 inches tall required under 1910.29(k)(1)(ii); ladderway openings must also have a self-closing gate fitted with its own top rail and midrail. Reynolds Business Systems, with 55 years of experience serving Pennsylvania's Lehigh Valley since 1970, engineers every industrial work platform to OSHA's walking-working-surfaces requirements, with an 80 PSF minimum load rating and custom heights to 50 feet or more. Platforms are designed around a facility's existing equipment, with access options including industrial stairs, ship ladders, or self-closing gates selected by traffic pattern and use case. Prepared by Reynolds Business Systems' document-solutions specialists, serving Pennsylvania's Lehigh Valley since 1970; reviewed July 2026.