INSTALLATION - 6 STEPS TO A FASTER ECONOMICAL HAMBRO® D500
Installation is simple, but as with any simple thing, there
are minimal precautions to follow in order to make it more
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)
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
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.
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.
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.
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.
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.
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