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Installation is simple, but as with any simple thing, there are minimal precautions to follow in order to make it more efficient.

The purpose of this guide is to help you become familiar with the techniques which will result in satisfied customers (architects, engineers, building owners, and contractors) at the end of every project.

(click on any image to enlarge)

Spreading the Joints

1.Spreading the Joists:
Bundles are placed on walls or beams and spread to approximately 4' o/c. With this greater joist spacing, the number of joists to be handled is reduced. A benefit in joist sorting especially on tight sites where space is limited.

Placing Rollbars

2.Placing Rollbars®:
These secondary members are designed to support the forms, slab, and construction loads. When rotated and locked into holes in the top chord, Rollbars® guarantee exact joist spacing while providing lateral and torsional stability. No permanent bridging or bracing is required. Bottom chords are fabricated with clips to accommodate a Rollbar for additional bracing as required.

Installing Plywood Forms

3.Installing Plywood Forms:
The system reuses full sheets of standard 3/8" CDX grade plywood. Plywood is lapped and together with the Rollbars provides a secure platform during construction.

Mesh in Place
4.Mesh in Place:
Standard 8' x 20' sheets of mesh are easily placed over the top chords of Hambro® joists. The mesh drapes and forms a natural catenary to reinforce and support the concrete slab.
Pouring Concrete
5.Pouring Concrete:
Minimum 2-3/4" - 3000 psi monolithic slab forms an acoustical seal where the slab passes over walls. The top chord protrudes into the slab for composite action, and serves as a guide for screeding.
Stripping Formwork
6.Stripping the Formwork:
Rollbars® and plywood may be stripped when the concrete reaches 500 psi, which is usually the day after the pour. The deck is ready for other trades when the concrete reaches a strength of 1,000 psi. The formwork is easily removed for future re-use.

View Detailed Installation Guide

Download the Installation Guide in Adobe Acrobat Reader PDF format.



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