A concrete slab is a structural feature, usually of constant thickness, that can be used as a floor or a roof. A slab-on-ground is supported on the subsoil and is usually reinforced with reinforcing bars or welded wire mesh. A suspended slab (or structural slab) spans between supports and must be reinforced to resist bending moments calculated from statics based on the magnitude of load and ...
This guide presents state-of-the-art information relative to the construction of slab-on-ground and suspended-slab floors for industrial, commercial, and institutional buildings. It is applicable to the construction of normalweight and struc-tural lightweight concrete floors and slabs made with conven-tional portland and blended cements.
Tilt-up concrete construction is commonly used in low-rise building construction. This guide discusses many of the issues relating to the planning and construction of these buildings to produce a quality tilt-up project. Major topics include preconstruction planning, foundations, special considerations for slab-on-ground construction, wall panel forming and casting, panel erection, connections ...
The use of higher-grade reinforcement raised concerns about serviceability (cracking and deflections), which were addressed through a series of changes for slab and beam minimum reinforcement, efective moment of inertia, and requirements for deflection calculations for two-way slabs.
Conventional saw cuts should generally be made to one-fourth the depth of the slab (ACI 327R-14), although early-entry saws can cut to a lesser depth and still be effective (ACI 224.4R-13). In terms of preventing damage where cuts cross each other, joint protectors can help maintain the integrity of the slab at intersections.
This guide covers the design of slabs-on-ground for loads from material stored directly on the slab, storage rack loads, and static and dynamic loads associated with equipment and vehicles.
What nominal maximum sizes of aggregate are recommended? Q. What nominal maximum sizes of aggregate are recommended? A. According to 26.4.2.1 (a) (5) of ACI 318-19, nominal maximum size of coarse aggregate shall not exceed the least of (i), (ii), and (iii): (i) one-fifth the narrowest dimension between sides of forms (ii) one-third the depth of slabs (iii) three-fourths the minimum specified ...
Acceptable concrete cracking Q. What is considered as acceptable concrete cracking in cast-in-place foundation walls and slabs per ACI documents? My company is the concrete contractor on a large warehouse project, and I want to discuss the potential for cracking with the contractor and the owner. A. Concrete cracks are possible on any project, so it’s wise to set reasonable expectations for ...
The resulting shear capacity will be less than calculated in ACI 318-14, especially if the design section has a low ρ as is likely in double-tee flanges, other precast slab elements, or cast-in-place slabs.
