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OCR for page 70
70 NOTATIONS A = area of an equivalent compressive stress block for P = permanent load other than dead loads simple beam theory Q = first moment of transformed area of the slab b = total slab width RFLRFR = rating factor based on LRFR provisions beff = effective slab width Rn = nominal member resistance Cslab = total or resultant compressive force in the slab S = girder spacing DC = dead-load effect due to structural components and Stop = elastic section modulus for the extreme compres- attachments sion fiber DW = dead-load effect due to wearing surface and utilities t = slab thickness f c = concrete compressive strength tslab = slab thickness i = element number V = shear force Ixx = second moment of inertia zo = location of resultant compressive force in the slab IM = dynamic load allowance DC = LRFD load factor for structural components and MFEM = bending moment at a specific cross section attachments L = span length DW = LRFD load factor for wearing surfaces and utilities LL = live-load effect L = evaluation live-load factor L1 = exterior span length P = LRFD load factor for permanent loads other than L2 = interior span length dead loads mi = absolute average quantity = element longitudinal stress C = capacity max = maximum compressive stress at the extreme com- Dc = depth of the compression portion of the web pression fiber of slab fcrw = web stress min = minimum compressive stress at the bottom of the slab fR = allowable stress specified in the LRFD code = skew angle pallow = threshold acceptable percentage = LRFD resistance factor p1 = absolute average percentage C = condition factor p2 = maximum absolute average percentage S = system factor