What are the rise and run of Avanza Steel’s stair units?

We offer 1.0 m, 1.5 m, and 2.0 m rise stair units (ST-10, ST-15, ST-20) each with a 250 mm run per tread—see page 18 of the [Brochure] for precise layouts Avanza brochure.

Can stair units be mixed with H-Frame and Cuplock scaffolds?

Yes. The captive-nut bracket system fits both 48.3 mm OD H-Frame ledgers and Cuplock standards.

What is the maximum live load capacity?

Each module is rated for 2 kN (≈ 200 kg) live load, with a 1.5× safety factor built into the design.

How do I prevent stair tread slippage?

Our checker-plate treads exceed R11 slip-resistance on wet surfaces. Ensure regular cleaning to maintain grip.

Are custom configurations available?

Yes—angle of ascent, landing widths, and toeboard heights can be tailored. Contact us for bespoke design per page 19 of the Brochure. Avanza brochure.

Scaffolding Towers: Durable and Safe Solutions for Construction Needs

Scaffolding staircases provide secure, code-compliant vertical access on construction sites, blending the stability of fixed stairs with the flexibility of modular scaffolding. Avanza Steel’s MS stair units feature precision-fabricated mild steel frames, non-slip treads, and adjustable connections, making them ideal for multi-level access in residential, commercial, and industrial projects.

What Is a Scaffolding Staircase?

A scaffolding staircase is a prefabricated stair unit that integrates into a scaffolding structure, offering a safe ascent and descent between deck levels. Unlike ladders, these stairs have constant rise/run dimensions, full-height handrails, and toeboards, ensuring compliance with BS EN 12811–2 and OSHA 1926.1053 standards.

Top Advantages:

Enhanced Safety
Continuous handrails at 1 m height, rigid guard-toeboards, and non-slip treads reduce fall risk.
Modular Flexibility
Units in 1 m, 1.5 m, and 2 m rise configurations stack seamlessly on standard scaffolding frames.
Rapid Installation
Tool-free couplers and captive nuts enable one-person assembly in under 5 minutes per flight.
Durable Finish
Hot-dip galvanization (85 µm) protects against corrosion in outdoor environments.

Technical Specifications

Parameter	Specification
Unit Rise Options	1.0 m (ST-10), 1.5 m (ST-15), 2.0 m (ST-20)
Tread Material	2.5 mm MS checker-plate (anti-skid)
Frame Profile	50×50×3 mm MS square tube, welded per IS 1161 tolerances
Handrail Height	1.0 m above tread nosing
Connection Method	Captive M12 nuts & bolts, rapid-fit couplers
Toeboard Height	150 mm, clip-on design
Finish	Hot-dip galvanization (85 µm) or epoxy-dip paint (50 µm)
Load Capacity	2.0 kN per stair unit (approx. 200 kg live load plus safety factor)
Compliance	BS EN 12811–2, OSHA 1926.1053

Applications & Use Cases

Multi-Story Residential Projects

Provide safe house-to-house vertical access during blockwork and plastering operations.
Commercial Fit-Outs

Facilitate rapid, code-compliant access across mezzanine floors, atriums, and service risers.
Industrial Maintenance

Enable inspection and servicing of equipment at height in factories, warehouses, and power plants.
Event & Temporary Structures

Deploy stair units in grandstand scaffolds and exhibition platforms for crowd access under safety regulations.

Installation & Best Practices

Site Preparation
Ensure supporting scaffolding frames are plumb and level; install MS base plates or soleboards on uneven ground.
Stair Unit Placement
Position the stair unit against the landing ledger; align the captive nuts with pre-drilled holes.
Securing Connections
Insert M12 bolts through the stair bracket into the ledger; hand-tighten and then torque to 25 Nm to prevent loosening under load. Clip-on toeboards at each landing platform to contain debris.
Handrail Assembly
Slide the handrail tubes into the fixed sockets on the side frames; secure with spring-pins.
Landing Integration
Ensure adjacent deck planks or walkways butt flush against stair stringers; use transitional plates or MS jaali walkway units for seamless entry and exit.

Maintenance & Lifecycle

Before Each Use
Confirm stair treads are free from debris, inspect bolts for full engagement, and test handrail stability by applying lateral pressure.
Monthly Thorough Inspection
Examine welds for cracks, check galvanization integrity, and lubricate coupler threads with light machine oil to prevent galling.
Post-Use Care
Wipe down surfaces to remove cement splatter; stack stair units upright in a covered area to avoid moisture accumulation.
Lifecycle Management
Replace any stair unit showing > 5 mm tread deformation, bent stringers, or compromised handrail sockets to maintain safety compliance.

Ensure safe, efficient vertical access on your next project with Avanza Steel’s modular staircases:

👉 Download the full Product Brochure for detailed part codes, dimensional drawings, and load charts.

👉 Contact our team at avanzasteel@gmail.com or +91 33 4000 7575 to request a site-specific quote, arrange a factory tour, or schedule an on-site technical consultation.