Hambro D500


More than just a floor


With the Hambro product, Canam meets the needs of residential and multi residential markets by providing Architects, Engineers, Owners, Real Estate Developers, and General Contractors with optimized construction solutions. Canam offers an array of structural components, including the D500 floor system, Hambro composite girders and the Hambro transfer slab, which can be combined in order to design better adapted and more functional buildings.

The Hambro D500 composite floor system is your cost-effective answer to solid, reliable elevated slabs supported by proven floor joists. Compatible with all traditional structural systems, the Hambro D500 floor combines the flexibility of the D500 joists with the strength of a reinforced concrete slab.
  • The web system consists of vertical and diagonal members.
  • The top chord S connector closes the opening between the two angle sections.
  • In addition to the S connector and where necessary for shear requirements, U-shaped channels developed specially by Hambro can be shop-installed on the girder between the Hambro joists.


An Economical



  • Maximum duct opening for easy installation of HVAC, electricity and plumbing systems
  • Less concrete and reinforcing steel than conventional slabs, minimizing costs, and saving on-site construction time
  • Long span without shoring to reduce number of load-bearing walls
  • Rigidity and strength of the steel/concrete design
  • Fire protection: Hambro system complies with UL/ULC/cUL ratings--  Download UL-G524
  • Acoustical properties: Hambro system meets STC 57 / IIC 30 rating requirements
  • Versatile: compatible with all traditional structural systems
  • Reusable plywood form
  • Optimum service: fast and dependable deliveries, project management, technical assistance, value engineering, design plans.



The ease and speed of installing the Hambro D500 floor system eliminates the need for skilled trades.

Placing Rollbars

The rollbars are designed to support the plywood forms, concrete construction load. When rotated and locked into the notches in the top chord, the rollbars lock the joists in place while providing lateral and torsional stability to the joists.

Spreading Joists

The joists are placed on the walls or beams and positioned in compliance with the shop drawings issued for construction by Canam. The joist connection methods are also shown on the Canam drawings.

Installing Plywood Forms

Together, the plywood and the rollbars form a rigid diaphragm during construction, providing a safe platform for workers. The Hambro system uses standard 4 ft x 8 ft x ½ in.2 (1,200 mm x 2,400 mm x 13 mm2) plywood sheets.

Sheets of mesh

Welded wire mesh serves as the standard catenary for the slab. Standard 8 ft x 20 ft (2,400 mm x 6,100 mm) sheets of mesh are easily placed over the top chords of the Hambro joists. The top chord acts as a high chair.

Pouring concrete

When pouring and finishing a Hambro slab, it is not necessary to complete the entire deck in a single pour. In the event that the pour is interrupted parallel to the joists, the joint should be midway between the joists, but never less than 6 in. (152 mm) from the top chord in order to ensure composite action.

Stripping formwork

When the concrete attains a cylinder strength of 500 psi (3.5 MPa), the rollbars and plywood forms can be removed. When the concrete attains a cylinder strength of 1,000 psi (7 MPa), the floor is ready but care must be taken not to surpass the admissible loads for the specified capacity.

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