Throughout North America, mid and high-rise residential structures have typically been constructed of cast-in-place reinforced concrete offering benefits such as low floor-to-floor height and fireproof construction. Despite its benefits, this system is expensive, time-consuming, labor intensive and weather sensitive.
The GIRDER-SLAB® system combines the advantages of structural steel and cast-in-place concrete. This proven technology has become the industry standard for achieving low floor-to-floor heights with structural steel in multi-story residential buildings.
The GIRDER-SLAB® system consists of an interior steel girder known as an open-web dissymmetric beam (or D-BEAM® girder), and precast prestressed hollow core slabs connected by cementitious grout. This lightweight assembly develops composite action enabling the system to carry significant loads. An eight-inch or ten-inch thick precast hollow core slab provides for low floor-to-floor heights, is non-combustible, and the underside of the slab with its smooth form finish is ready-made for ceiling finish. The D-BEAM® girder is a fabricated inverted tee assembly contained within the plane of the floor that eliminates issues associated with a standard wide flange beam sitting below the slab.
APPLICATION:
The GIRDER-SLAB® system is ideal for use in mid to high-rise residential structures such as apartments, condominiums, hotels, student housing and senior living developments.
The system is fire rated for use in residential buildings when constructed in accordance with Underwriters Laboratories, Inc. Floor Ceiling Design No. K912.
DESIGN:
The GIRDER-SLAB® system is designed by the owner’s architect and structural engineer in combination with a conventional structural steel frame. Unlike cast-in-place concrete structures, the GIRDER-SLAB® system uses off site prefabricated components that are quickly erected on site by one trade, ironworkers. The system is low cost, lightweight and offers rapid assembly and construction.
THE D-BEAM® GIRDER:
The components of the system, structural steel (including the unique D-BEAM® girder) and precast prestressed hollow core slabs, are manufactured and supplied by the builder’s customary subcontractors, guaranteeing the owner competitive procurement of the building’s superstructure.
FEATURES & BENEFITS:
+Low floor-to-floor height, minimize building height
+Reduction of structural cost by 25-30%
+Reduce building structure weight
+Available competitively from customary sources
+Limited weather impact (including cold climates)
+Structure assembly is one process
+Reduced on-site overhead costs
+Provides faster access to the work of other trades
+Reduced construction schedules
Since 1997, the Girder-Slab System has saved owner/developers and design professionals over 1,314,000 hours of construction time and $37,500,000 in aggregate construction cost. This is why 91% of design/development professionals who have built using the Girder Slab System, have used our system a second time (or more).
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