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2.Metal floor deck ensures quick concrete pouring without extra forms.
3.Galvanized composite deck provides structural strength and fire performance.
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alvanized steel floor deck is a cold-formed product made from hot-dip galvanized steel coils, widely used as permanent formwork and tensile reinforcement in steel-framed buildings. According to its cross-sectional shape and structural behavior, it is mainly classified into four types: open rib deck, closed rib deck (also called cellular deck),steel bar truss deck and cast-free deck or dry deck. Open rib decks feature re-entrant or dovetailed ribs for good concrete bond; closed decks provide a flat soffit and higher fire resistance; steel bar truss decks incorporate prefabricated trusses to reduce on-site rebar work; cast-free decks are designed to eliminate wet concrete pour entirely. To compare different floor deck classifications, search “open vs closed vs truss floor deck types”; to understand fire resistance of closed decks, use “cellular deck fire rating UL design”; for truss deck advantages, search “steel bar truss deck composite slab benefits”; to review cast-free deck applications, use “dry deck system no concrete pour”.
The open rib deck is the most traditional type, with rib heights ranging from 35 mm to 120 mm and thicknesses from 0.75 mm to 1.5 mm. Its open profile allows concrete to form a mechanical bond through the ribs. The closed rib deck has a flat bottom surface, making it suitable for exposed ceilings and short-span applications. It also offers better diaphragm action. The steel bar truss deck consists of a flat galvanized base sheet with welded wire trusses, greatly reducing on-site rebar placement and labor. The cast-free deck uses a pre-filled lightweight concrete or composite infill, eliminating the need for site casting and shortening construction schedules significantly. For selection guidance based on span and load, search “open rib deck span load table”; to evaluate closed deck diaphragm capacity, use “cellular deck shear stiffness value”; for truss deck installation steps, search “steel bar truss deck erection procedure”; for cast-free deck fast-track construction, use “cast-free floor deck quick installation guide”.
These four types of galvanized floor decks are widely used in steel-framed commercial buildings, industrial workshops, multi-storey car parks, residential podiums, data centers, and hospitals. Open rib decks are preferred for long-span industrial floors; closed decks are commonly used in office buildings where a flat ceiling is desired. Steel bar truss decks are popular in high-rise residential projects where site labor and rebar work need to be minimized. Cast-free decks are ideal for renovation works, temporary structures, and projects requiring immediate occupancy. Typical steel grades used include SQ280 (ASTM A653 Grade 33), SQ340 (Grade 40), and F550 (Grade 80). To select the right deck type for a commercial building, search “floor deck selection guide for steel frame”; for truss deck in residential high-rise, use “steel bar truss deck apartment slab”; for renovation application of cast-free deck, search “dry deck system for building retrofit”; for diaphragm design using closed deck, use “cellular steel deck shear diaphragm design example”.
When sourcing galvanized floor decks internationally, critical parameters include base steel grade, zinc coating weight (e.g., G60, G90, Z275), profile geometry (rib height, pitch, effective width), nominal thickness, and yield strength. For open and closed decks, confirm whether embossments are provided on ribs to enhance bond with concrete. For truss decks, check the truss wire diameter and spacing. For cast-free decks, verify the pre-filled core material and its load-carrying capacity. Also request end-lap details, side-lap fastening methods (button punching or self-drilling screws), and third-party test reports (fire resistance, sound insulation, and load-deflection). For thickness tolerance standards, search “ASTM A653 floor deck thickness tolerance”; to compare international coating specifications, use “G90 galvanized vs Z275 equivalent”; for current market pricing, search “galvanized floor deck price per square meter 2025”; to locate certified global suppliers, use “floor deck manufacturers Europe directory”.
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