Temporary stair access guide

What Is a HAKI Staircase?

A HAKI staircase, often called a HAKI stair tower, is a modular system scaffold stair tower used for temporary stepped access between ground level, working levels and elevated construction areas.

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Interactive stair tower layout

System components

Built from proprietary HAKI components

Standards & base jacks

Vertical system uprights and adjustable bearing points.

Ledgers

Horizontal members forming the tower framework.

Flights & treads

Stepped access between temporary landing levels.

Landings & guardrails

Level access points with side protection.

Planning and load class

The access duty determines the configuration

Purpose, intended users and expected footfall.
Height, lift pattern, landings and available footprint.
Base condition, sole boards and bearing support.
Ties, anchors, buttressing or design input where required.
Correct HAKI manual and configuration data.

Load class: HAKI stair tower loading depends on the exact stair system and configuration. HAKI's own stair chart separates compact stair towers, stair towers, symmetrical stair towers, twin stair towers and public access stair towers by safe working load and permitted use.

As a technical rule, the load class must be checked against the current HAKI stair chart and user guide for the specific system being used. The chart includes examples such as 1kN/m², 4kN/m², 5kN/m² and 7.5kN/m² stair options depending on the HAKI stair type and intended application.

Technical references

Use the manufacturer data first

HAKI User Guide

Assembly, bracing, stair, landing and tying data.

HAKI Stair Chart

Safe working load, application and permissible use.

TG30 / BS EN 12811-1

System scaffold and working-scaffold guidance where applicable.

TG21:20

Design input outside standard configuration.

Common questions

HAKI staircase FAQs

Is a HAKI staircase the same as a ladder bay?

No. A HAKI staircase provides stepped access using stair flights and landings. A ladder bay uses ladders.

Does a HAKI staircase need tying?

It depends on height, configuration, exposure, base condition and manufacturer data.

Can loads be guessed from another stair system?

No. Check the correct HAKI stair chart and user guide for the specific product.

Need a HAKI staircase assessed?

Send the access height, intended users, photographs or drawings and footprint restrictions so BlackFox can review the access requirement.

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