(a) Solid slabs
(b) Slabs cast on stay-in-place, noncomposite steel deck
(d) Precast, prestressed hollow-core slabs
Table 18.104.22.168—Minimum thickness of solid nonprestressed one-way slabs
|Support condition||Minimum h|
|One end continuous||ℓ/24|
|Both ends continuous||ℓ/28|
(a) Support reaction, in direction of applied shear, introduces compression into the end region of the slab
(b) Loads are applied at or near the top surface of the slab
(c) No concentrated load occurs between the face of support and critical section
(b) Only the effective overhanging slab width in accordance with 6.3.2 need be considered.
(a) Vu ≤ (2/3)ϕVn at the cutoff point.
(b) For No. 11 bars and smaller, continuing reinforcement provides double the area required for flexure at the cutoff point and Vu ≤ (3/4)ϕVn.
(c) Stirrup area in excess of that required for shear is provided along each terminated bar or wire over a distance 3/4d from the termination point. Excess stirrup area shall be not less than 60bws/fyt. Spacing s shall not exceed d/(8βb).
(a) ℓd ≤ (1.3Mn/Vu + ℓa) if end of reinforcement is confined by a compressive reaction
(b) ℓd ≤ (Mn/Vu + ℓa) if end of reinforcement is not confined by a compressive reaction
Mn is calculated assuming all reinforcement at the section is stressed to fy and Vu is calculated at the section. At a support, ℓa is the embedment length beyond the center of the support. At a point of inflection, ℓa is the embedment length beyond the point of inflection, limited to the greater of d and 12db.