Floor construction

Floor construction

A floor of a building generally provides a wearing surface on top of a flat support structure. Its form and materials are chosen for architectural, structural, and cost reasons. A ground-supported floor may be of almost any firm material, ranging from compacted soil to reinforced concrete. It is supported directly by the subsoil below.

An elevated floor spans between, and is supported by, beams, columns, or bearing walls. It is designed to be strong and stiff enough to support its design loading without excessive deflection; to provide for an appropriate degree of fire resistance; and to supply diaphragm strength to maintain the shape of the building as a whole, if necessary. A ceiling may be hung from the underside of the floor assembly as a finish surface for the room below. The optimum floor design meets these criteria while being as thin as possible and economical to construct. See Beam, Column, Loads, transverse

Wooden floors are generally used in light residential construction. Such flooring generally consists of a finish floor installed on a subfloor of tongue-and-groove planking or plywood, spanning between wooden beams that are commonly called joists. Slabs fabricated of reinforced concrete are a common type of floor for heavier loading. The concrete is cast on forms, and reinforced with properly placed and shaped steel bars (rebars), so as to span between steel or reinforced concrete beams or between bearing walls. Composite floors are commonly used in modern office building construction. Concrete is cast on, and made structurally integral with, corrugated metal deck, which spans between steel joists of either solid-beam or open-web types, generally spaced between about 16–48 in. (40–120 cm) on center. Prestressed concrete is used for long span slabs. Highly prestressed high-tension steel wires within the high-strength concrete slab produce a thin, stiff, and strong floor deck. A lift slab is used for economy and efficiency. A concrete slab is first formed at ground level, reinforced and cured to adequate strength, and then carefully jacked up into its final position on supporting columns. See Composite beam, Concrete slab, Prestressed concrete, Structural design

References in periodicals archive ?
950 m 2 of raised floor as dry cavity floor construction.
With increasing thermal resistance of the floor covering (carpet instead of tile), as well as the floor construction above the tubes, the cooling capacity decreases if the Entering Water Temperature (EWT) is kept constant.
He has also served on the American Concrete Institute board and was secretary of ACI 302, Floor Construction, for 11 years.
Floor construction varied between venues and a range of floor mechanical properties were observed.
The floor construction could interfere with the annual Antique Show depending on the completion date.
The review covers the period from the early 19th century, when stone-based floor construction became common in Finland, to the present.
The 4,500sq metre new build scheme takes advantage of Velta's thermally active building system, which has been installed into the concrete core of the building in varying floor construction types.
Featuring 2x4 floor construction, all plans will offer ADA-compliant Ricon wheelchair lifts, extra-wide interior pass-through doorways, and modified floor space for easy wheelchair access.
He progressed through the stages of site investigation, excavation and foundations, constructing basements, structural systems for the superstructures, site and material handling, wall and floor construction, cladding, and roof construction.
was originally going to use radiant floor heat, but the floor construction would have made it a complicated task.
But Sturd-I-Floor, he says, is a combined subfloor-underlayment product designed for single-layer floor construction.
I-joists now total about 33 percent of the residential floor construction market and the number should jump to 40 percent this year, he said.