Pre-cast Attachment Sleeve
The Pre-cast Attachment Sleeve is a lightweight sleeve (0.33 kg, code 74408) that is welded onto a steel beam before concrete is poured around the beam. Once the concrete has cured, the sleeve sits flush within the structure and accepts a Combisafe safety post. Because the sleeve is cast into the concrete rather than surface-mounted, the post seats into a recessed, locked position that resists accidental removal, providing a higher level of security than surface-mounted scaffold fittings.
Pre-cast applications are common on composite steel and concrete floor systems where permanent edge protection provisions are designed into the structure at the detail drawing stage. The Pre-cast Attachment Sleeve addresses this requirement with a component that is robust enough to survive the concrete pour, light enough to handle without lifting equipment, and compatible with the full range of Combisafe safety posts. The sleeve pairs with the Welded Socket system for applications where the post must also be lockable after insertion.
At 0.10 kg in the System C specification, the sleeve adds negligible weight to the steelwork fabrication and imposes no restriction on the beam's structural performance. The zero-maintenance design means no post-pour intervention is required before the posts are fitted. Altrad Generation supplies the Pre-cast Attachment Sleeve through its UK and Ireland network alongside the full range of Combisafe edge protection scaffolding components.
Key features and benefits
Welded to steel beams before concrete is poured, creating a permanent, recessed post socket in the finished structure
0.33 kg (System C specification) adds negligible weight to steelwork fabrication
Accepts Combisafe safety posts directly after the concrete has cured, with no surface preparation required
Recessed post seating resists accidental removal, providing higher security than surface-mounted fixings
Zero-maintenance design requires no post-pour intervention before posts are fitted
Compatible with the Welded Socket system for lockable post installations
Suitable for composite steel and concrete floor systems where edge protection provisions are designed in at detail stage
Available through Altrad Generation's UK and Ireland branch network
Frequently asked questions
Q: What is a pre-cast attachment sleeve in construction?
A: A pre-cast attachment sleeve is a steel socket that is welded to a structural steel beam before the concrete pour. When the concrete is placed, the sleeve is encased in the slab while its opening remains accessible at the surface. After the concrete has cured, a Combisafe safety post is inserted into the sleeve to form part of the edge protection system. The sleeve prevents the post from being accidentally removed because the concrete mass anchors the sleeve geometry, resisting withdrawal forces from the post.
Q: How do pre-cast sockets work with safety posts?
A: Once the concrete has cured and exposed the sleeve opening at the slab surface, a Combisafe safety post is inserted into the sleeve and locked via the sleeve geometry. The post seating within the sleeve resists rotation and uplift, creating a tamper-resistant connection without the need for additional mechanical locking devices. When the safety post is no longer needed, for example after permanent balustrades are installed, the post is withdrawn and the sleeve opening is covered, leaving the structural integrity of the slab unaffected.
Q: What is the difference between a pre-cast sleeve and a welded socket?
A: A pre-cast attachment sleeve is factory-welded to the beam before the concrete pour and becomes embedded in the slab. A welded socket is field-welded to an existing steel beam after fabrication is complete, typically in situations where edge protection provisions were not designed in at the structural detail stage. The pre-cast sleeve weighs 0.33 kg and is intended for composite slab systems. The welded socket weighs 0.5 kg (standard) or 2.5 kg (intermediate flange variant) and is used on exposed steelwork in post-fabrication applications.
Get in touch with us
To purchase the Pre-cast Attachment Sleeve, contact your nearest Altrad Generation branch. Our teams across the UK and Ireland advise on integration with your structural detail drawings and supply the full Combisafe post and socket range.
