- Closes automatically after every passage
- Swings onto the platform, never over the drop
- Clamps to WS stanchions – no welding
- Widths to suit ladder and hatch openings
- Galvanized or safety yellow
What it is
A self-closing gate closes the gap in a guardrail where people step on and off a fixed ladder, a ship ladder or a roof hatch. Spring hinges return the gate to the closed position after every passage, so the opening is never left open the way a chain or drop bar can be.
Range
| Code | Gate | Opening |
|---|---|---|
| WS-MH-G1 | Single gate, spring hinges | Up to typical 900 mm |
| WS-MH-G2 | Adjustable-width gate | Telescopic leaf to fit the opening |
| WS-MH-G3 | Gate with toe plate | Where a toe board is required |
| WS-MH-G4 | Lockable gate | Restricted roof and plant access |
Design and compliance
EN ISO 14122-3 and -4 call for self-closing gates at access openings in guardrails, and many projects under OSHA and AS 1657 prefer them to chains; the gate must open away from the drop and meet the guardrail loads when closed. World Steel details the gate with the platform so the ladder clearance and the swing are checked.
Installation and selection
- Clamp the hinge and stop fittings to the stanchions either side of the opening.
- Check that the gate swings onto the platform and closes fully.
- Specify the opening width and the ladder or hatch position.
Fabrication and finishing at World Steel
Every WS modular handrail component is made in the World Steel plant in Vietnam: tube and bar are cut on saws to the component schedule, stanchions are welded to base plates, brackets or socket spigots on jigs so that rail heights repeat exactly, and fittings are fabricated from heavy-wall tube and plate, drilled and tapped for their locking screws. Welding follows qualified procedures under ISO 3834-2 and the AS/NZS 5131 and EN 1090-2 systems our certifications cover.
Components are then hot-dip galvanized as single pieces – which is only possible because the system is modular – giving full internal and external zinc coverage with no site welds to repair afterwards. A safety-yellow or architectural topcoat can follow. Parts are marked with their WS code, bagged by type and packed by area for export shipping, together with the structural steel or on their own.
市場別の規格と要求事項
World Steelが本製品の設計・製作・書類作成に適用する基準――および各市場における主な寸法・荷重要件。
米国
- OSHA 29 CFR 1910.29Fall protection systems – guardrails
- ASCE 7Minimum design loads – guard systems
- IBCInternational Building Code – guards
- ASTM A123Hot-dip galvanized coatings
- Top rail height
- 42 in ± 3 in (OSHA 1910.29(b))
- Rail loads
- Top 200 lbf, mid 150 lbf (OSHA 1910.29(b))
- Max opening
- 19 in (OSHA 1910.29(b))
豪州 / NZ
- AS 1657-2018Fixed platforms, walkways, stairways and ladders
- AS/NZS 1170.1Imposed actions – barrier loads
- AS/NZS 5131 WSC認証取得Fabrication and erection of structural steelwork
- AS/NZS 4680Hot-dip galvanized coatings
- Guardrail height
- 900–1100 mm (AS 1657)
- Toe board
- ≥ 100 mm where required (AS 1657)
欧州
- EN ISO 14122-3Stairs, stepladders and guard-rails
- EN 1991-1-1Imposed loads – barriers
- EN 1090-2 WSC認証取得Execution of steel structures
- EN ISO 1461Hot-dip galvanized coatings
- Guard-rail height
- ≥ 1100 mm (EN ISO 14122-3)
- Rail gaps
- ≤ 500 mm (EN ISO 14122-3)
- Toe-plate
- ≥ 100 mm (EN ISO 14122-3)
参考用の概要です――プロジェクト仕様書、採用される基準の版、所轄官庁の判断が優先されます。
表面処理
| 表面処理 | 規格 / 備考 |
|---|---|
| Hot-dip galvanized (standard) | ASTM A123 / A153 · AS/NZS 4680 · EN ISO 1461 |
| Duplex – HDG + safety-yellow topcoat | ASTM A123 + topcoat · AS/NZS 4680 + AS/NZS 2312.1 · EN ISO 1461 + EN ISO 12944 |
| HDG + powder coat (architectural colours) | Galvanized, then polyester powder coat for visible public areas |
よくある質問
Why not a chain across the ladder opening?
A chain is easily left unhooked and may not meet the guardrail loads; a self-closing gate always returns to closed.
Which way does the gate open?
Always inward, onto the platform – never towards the drop.













