Site Z-Staircase Access Towers: 60 cm & 90 cm Galvanized Steel and Aluminium Stair Modules
Modern HSE regulations prohibit vertical ladders for primary site circulation into deep foundation pits, bridge piers, or multi-story concrete cores. SerMimar Steel & Aluminium Z-Staircase Towers provide residential-grade stair comfort with intermediate landings and full dual-sided handrails.
Quick Engineering & Export Dispatch Summary
60 cm vs. 90 cm Tread Width & Steel vs. Aluminium Selection
Heavy-duty 90 cm Steel Z-Staircases (SM-A282, 70–77 kg) allow two workers with toolboxes—or an emergency stretcher team—to pass comfortably on long-term towers, whereas 17–32 kg Aluminium Z-Stairs (SM-A471/472) assemble rapidly by hand without crane time.
Freestanding or Shoring-Wall Tied Excavation Pit Access (-20m to +50m)
Framed inside a 4-leg Ringlock chassis anchored to secant pile shoring walls or bridge piers, Z-stair flights create an uninterrupted vertical highway from deep basements to upper superstructure decks.
Gap-Free Inner, Outer & Ground-Entry Guardrail Sets
Every flight pairs with dedicated SM-A286/476 inner handrails, SM-A287/477 outer guardrails, and SM-A288/478 starter entry rails so workers are protected from the very first step.
Scaffolding Bill of Materials (BOM), Tonnage & Container Load Calculator
Enter your building facade dimensions, EN 1004 mobile tower height, or slab perimeter to compute exact SM-series component quantities, net kg tonnage, and 40HC/FTL load ratios.
| Photo | SKU Code | Component Description | Dimensions | Qty | Unit Weight | Total Weight |
|---|---|---|---|---|---|---|
| SM-F201-048200 | Ringlock Vertical Standard (4F) | 200 cm - 4F | 72 | 8.9 kg | 640.8 kg | |
| SM-F258-048025 | Ringlock Base Collar | 25 cm | 6 | 1.6 kg | 9.6 kg | |
| SM-F211-048250 | Ringlock Horizontal Ledger | 250 cm | 96 | 7.4 kg | 710.4 kg | |
| SM-F211-048075 | Ringlock Transom Ledger | 75 cm | 39 | 2.6 kg | 101.4 kg | |
| SM-F221-048324 | Ringlock Diagonal Brace | 324 cm | 12 | 9.6 kg | 115.2 kg | |
| SM-F234-031250 | Hot-Dip Galvanized Steel Deck (1.5 mm) | 30x250 cm | 24 | 16.0 kg | 384.0 kg | |
| SM-F462-060250 | Aluminium Access Deck with Ladder | 60x250 cm | 12 | 23.0 kg | 276.0 kg | |
| SM-F251-015250 | Steel Toe Board (Ringlock) | 15x250 cm | 24 | 5.5 kg | 132.0 kg | |
| SM-F272-120075 | End Guardrail with Toeboard | 75 cm | 24 | 7.7 kg | 184.8 kg | |
| SM-F608-038070 | Base Adjustment Screw Jack | 70 cm | 6 | 4.2 kg | 25.2 kg | |
| SM-A631-048060 | Wall Tie Anchor Pipe | 60 cm | 8 | 2.3 kg | 18.4 kg | |
| SM-A641-048048 | Forged Fixed Right-Angle Coupler | Ø48x48 | 8 | 1.1 kg | 8.8 kg | |
| SM-A632-012021 | Eye Bolt + M12 Expansion Anchor | 21,5 cm / M12 | 8 | 0.3 kg | 2.4 kg | |
| TOTAL CALCULATED NET WEIGHT | 339 | — | 2.61 Tons (2,609 kg) | |||
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Frequently Asked Engineering & Export Questions
Can Z-staircase towers connect to both Ringlock and H-Type facade scaffolding?
What is the exact weight difference between steel and aluminium Z-stairs?
Which stair width is required for emergency stretcher evacuation?
How many Z-stair flights are included in a 20-meter high access tower?
Can we purchase a standalone site stair tower package?
Get Your Factory-Direct B2B Scaffolding BOM & Proforma Quote Today
Send your building dimensions or DWG drawings directly to co-founders İdris YAĞMAHAN (Architect), Celalettin YAĞMAHAN (Civil Engineer) & M. Furkan YAĞMAHAN (Interior Architect) for an itemized SM-series quotation.
- Same-day itemized BOM, net kg tonnage & 20DC / 40HC / FTL loading plan
- EN 12810-1 & EN 12811-1 structural calculation and CAD layout support
- Factory-direct bulk dispatch from Gebze – Dilovası OSB manufacturing hub
