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The total linear length of platform/guardrail edge that requires a toe board.
Measure the full run of open-sided edge along the platform, runway, or scaffold that requires toeboard protection per OSHA 29 CFR 1926.502(j).
The length of the toe board stock/lumber as supplied.
3.66 m (12 ft) is a common stock board length. Use the actual length of the material you are purchasing or cutting from.
The vertical height of the toe board as installed.
OSHA 29 CFR 1926.502(j) requires a minimum vertical height of 3 1/2 inches (9 cm). 0.0889 m equals exactly 3.5 in.
The clearance gap between the bottom edge of the toe board and the walking/working surface.
OSHA 29 CFR 1926.502(j) allows no more than 1/4 inch (0.6 cm) of clearance above the walking/working surface.
Toe board stock lengths needed
17 board lengths
Measured against the two fixed figures in OSHA 29 CFR 1926.502(j), which this page restates and does not interpret. The board height entered is at or above the 3-1/2 in (9 cm) minimum. The gap above the walking surface is at or below the 1/4 in (0.6 cm) maximum. The 50 lbf (222 N) load capacity in the same paragraph is confirmed with the board's manufacturer and its material, not calculated here. Matching the figures quoted is not compliance. The rest of the requirement, and the installed work, are outside what this page can see.
- Toe board height
- 3.5 in (OSHA min 3.5in)
- Gap above surface
- 0.2 in (OSHA max 0.25in)
They open the calculator with your figures already in it
Guardrail Toe Board Height and Quantity Calculator: 17 board lengths — shown in imperial, US market. The link sets both, so the result they see is the one on your screen.
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How this was calculated
Formula source(s)
- Per OSHA 29 CFR 1926.502(j) (verified against the regulatory text): toeboards must be 'a minimum of 3 1/2 inches (9 cm) in vertical height,' capable of withstanding 'a force of at least 50 pounds (222 N) applied in any downward or outward direction,' with 'not more than 1/4 inch (0.6 cm) clearance above the walking/working surface.' Board count = ceil(Perimeter Length ÷ Standard Board Stock Length).
Inputs used
- Platform/Guardrail Perimeter Requiring Toe Boards
- 195 ft
- Standard Toe Board Stock Length
- 12 ft
- Toe Board Height
- 3.5 in
- Gap Above Walking/Working Surface
- 0.2 in
Intermediate steps
- Toe board height
- 3.5 in (OSHA min 3.5in)
- Gap above surface
- 0.2 in (OSHA max 0.25in)
Confidence note: Measured against the two fixed figures in OSHA 29 CFR 1926.502(j), which this page restates and does not interpret. The board height entered is at or above the 3-1/2 in (9 cm) minimum. The gap above the walking surface is at or below the 1/4 in (0.6 cm) maximum. The 50 lbf (222 N) load capacity in the same paragraph is confirmed with the board's manufacturer and its material, not calculated here. Matching the figures quoted is not compliance. The rest of the requirement, and the installed work, are outside what this page can see.
What this calculation does not cover
- Checks the board and stops at the top of it. Where tools or material are stacked higher than the toeboard's top edge, the falling-object rules call for paneling or screening carried up from the surface or the board to the toprail — so a compliant 3-1/2 in board with pipe stacked a foot high behind it protects nobody underneath and is still a violation.
- Assumes an unbroken run along the edge measured. The board only works where it is fastened tight against the edge it protects: set back from the deck edge it leaves a slot that passes exactly what it was there to stop, and ladder access points, gates and hoist openings need their own removable protection rather than a gap in the run.
- Reads against the fall-protection rule for guardrail systems. A scaffold platform is governed by the scaffolding standard instead, and its toeboard provision is stricter on load — 100 lbf rather than the 50 lbf quoted on this page, on the same 3-1/2 in minimum height. Confirm which rule the platform falls under before treating the comparison here as the whole answer.
Estimated cost — your price
This site holds no price list for this material — local prices vary too much to publish honestly. Enter your supplier's price and the result is costed with it.
Computed in your browser — nothing you enter is uploaded. Presented in US customary units and US trade terminology. Where a formula follows a published standard, that standard and its edition are cited beside it on this page; where none governs, the page says so. Local amendments override model codes — verify against the code in force where you build.
Sources checked 2026-09-06 · in the site-wide review of 2026-09-06 · v1.0.1
Regulatory standards & verification citations1
- Per OSHA 29 CFR 1926.502(j) (verified against the regulatory text): toeboards must be 'a minimum of 3 1/2 inches (9 cm) in vertical height,' capable of withstanding 'a force of at least 50 pounds (222 N) applied in any downward or outward direction,' with 'not more than 1/4 inch (0.6 cm) clearance above the walking/working surface.' Board count = ceil(Perimeter Length ÷ Standard Board Stock Length).
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