4×4 Step Block™

Create seating and stairs with retaining blocks

Fifteen years ago Holger Rust, owner of Terraforce – a local and international pre-cast concrete block licensor – developed a new retaining block, the Multi 4×4 Step block: a light, dry-stack concrete unit, generally used for constructing low terrace walls, stairs and seating arrangements.

Aimed at providing efficient and economical steps in conjunction with the original retaining blocks of his design, they soon became very popular not only for stairway access, but also to provide comfortable, practical stair and seating arrangements at leisure amenities and school sports facilities.

Basic installation guide Examples
4 x 4 Step block for stairs
 4×4 Multi Step block – Specsheet
Blocks/m² (measured vertically) 13
Block mass/kg 18
Block infill volume/m³ 0.007
Ave. constructed mass kg per m² of wall 370
Block wall thickness 40

Rust specifically designed the block with such versatility in mind:

“When used for retaining, the 4×4 Multi Step block has a unique design that allows you to simply stack up the units without mortar, and the corner interlock gently handles convex and concave curves. The wall angle can vary from vertical to shallow slopes, and steps can be created by turning the block on its side. It can also be rotated for four different elevation choices, and the design allows you to make plants part of your wall.”

INCLINATION RISER (mm) TREAD (mm) SEAT (mm)  4x4 Step block stairs and seating
angle A B C
23° 150 350 750
31° 200 330 710
35° 200 300 650
39° 200 250 550

Depending on local conditions and finish required, it may be advantageous to grout the joints with sand/cement slurry. Consult your local dealer about colour matching, further details, design information or a quotation. 

Guide to stand-alone stairs with the 4×4 Step block: 7/2021 – Free standing stairs made easy – Terraforce

Cross-section 1 Cross-section 2
Cross section for seating arrangement with 4x4 blocks  Cross section of a seating/stairs with 4x4 blocks
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