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Fire Ratings:
Hambro® has superior U.L. Fire Ratings for 1, 2 and 3 hours, and eliminates the need for fire dampers.

Acoustical Properties:
Hambro® has an STC 57 – one of the highest in the industry - and an IIC 30 on bare concrete. Hambro®’s IIC with soft vinyl is 55, and with pad and carpeting it increases to 69.

Mechanical Interfacing:
Features open web configuration, no bridging and 4’ to 6’ joist spacing accommodates MEP Support (mechanical distribution) within the joist plenum. Hambro® permits full-length ducts and pipes, and virtually eliminates dropped ceilings and sofits.

A Variety of Bearing Systems:
Hambro® is appropriate for a variety of bearing systems: steel stud, masonry, steel & concrete frames and wood framing.

Composite Design:
Hambro®'s composite design provides a floor that is 2 to 3 times more rigid, with one-third the deflection of typical bar joist assembly. Hambro also provides 4' joist spacing without bridging and bracing. Typical bar joist assemblies are spaced at 2' or 2'-6" on center and require bridging, bracing and metal deck.

Cost Savings:
Hambro® reduces building height and develops savings in the cost of skins and all other vertical components.

Ease of Installation
The Hambro® System is easily installed by one of the many experienced installers who contract with you directly and package related scopes of work, or by your own forces if you choose.

Hambro® is well-suited to a variety of projects including Apartments & Condos, Assisted Living, Highrise, Hospitality, Independent Living, Medical, Office, Religious & Assembly, Renovation and Schools & Dormitories.

Slab Penetrations:
Slab penetrations are easy using either sleeves, styrofoam or wood blocking prior to concreting. No tendons and fewer joists offer flexibility. Slender 3,000 PSI slab makes coring simple, if necessary.

Hambro®’s Typical Details have been developed as an aid to specifying professionals and are conveniently provided as a basic guide of suggested practice for the Hambro system.

And thanks to Swirnow Structures LLC:

  • Assistance is available every step of the way. We provide conceptual design and estimating; and we’re available at your job site when it counts.
  • A simple letter agreement without the fine print is usually all it takes to get started.
  • Guaranteed upfront pricing at the early stages of your design.
  • On most projects, a first shop drawing submittal can be made within 25 working days and joist deliveries within 4 weeks.



Swirnow Building Systems is a service mark used under license. The affiliates of Swirnow Building Systems and Swirnow Structures LLC are separate and independent legal entities.
No dealer or affiliate is responsible for the services or activities of any other dealer or affiliate.

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