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  1. Guardrail systems. Guardrail systems and their use shall comply with the following provisions: 1926.502 (b) (1) Top edge height of top rails, or equivalent guardrail system members, shall be 42 inches (1.1 m) plus or minus 3 inches (8 cm) above the walking/working level.

  2. Where workers on a construction site are exposed to vertical drops of 6 feet or more, OSHA requires that employers provide fall protection in one of three ways before work begins: Placing guardrails around the hazard area. Deploying safety nets.

  3. The criteria and practices requirements for guardrail systems on scaffolds are contained in 29 CFR part 1926, subpart L. Figure D-11 -- Guard Rail Systems. Depicts two figures showing two types of Guard Rail Systems. The first shows the walking-working surface, posts, and mid rail for guard system.

  4. The criteria and practices requirements for guardrail systems on scaffolds are contained in 29 CFR part 1926, subpart L. (c) Safety net systems. The employer must ensure each safety net system meets the requirements in 29 CFR part 1926, subpart M. (d) Designated areas.

  5. This guardrail system demonstrates how to protect an opening by using a top rail, an intermediate rail, a toeboard and posts. Note that the bracings are on the outside to avoid a tripping hazard. (Courtesy Construction Safety Association of Ontario) Figure 2. Guardrail systems also can be fabricated from

  6. Based upon the aforementioned results, it is possible to construct a job-built OSHA compliant guardrail, as evaluated with the described OSHA 200-lb drop test. The job-built guardrails can be safely constructed using construction-grade 2×4″ lumber and appropriately sized nails or screws.

  7. In this section, we’ll explore how OSHA regulations apply differently to residential construction, commercial and large-scale construction, and high-risk scenarios such as highway work zones and trenching operations.

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