Two-Way Slab Design Strength.

Both flexural moment and shear strength is controlled automatically according to Codes.

Dimensions of the cross-section should be satisfy Codes. It’s automatically controlled and users are warned if the rule is not satisfied.

International Design Codes

ACI 318-19 : Two-Way Slab Design Strength per ACI 318-19 with ideCAD

TSC 2018 : Punching Shear Stress at Critical Section (7.11.8)

Symbols in ACI 318-19

M_u= factored flexural moment at section, lb
M_n= nominal flexural strength at section, in.
M_sc= factored slab moment that is resisted by the column at a joint, in.-lb
f'_c = specified comprehensive strength of concrete, psi
A_c-sh= area of concrete used to determine shear stress, in²
A_g= gross area of concrete section, in²
b_w= web width or diameter of circular section, in.
d = distance from extreme compression fiber to centroid of longitudinal tension reinforcement, in.
h = overall thickness, height, or depth of member, in.
s = center-to-center spacing transverse reinforcement, in
V_c= nominal shear strength provided by concrete, lb
V_n= nominal shear strength, lb
V_s= nominal shear strength provided by shear reinforcement, lb
V_u= factored shear force at section, lb
γ_f= factor used to determine the fraction of M_sc transferred by slab flexure at slab-column connections

Next Topic

Two-Way Slab Reinforcement Limits.