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70 NOTATIONS A = area of an equivalent compressive stress block for simple beam theory b = total slab width beff = effective slab width Cslab = total or resultant compressive force in the slab DC = dead-load effect due to structural components and attachments DW = dead-load effect due to wearing surface and utilities f â²c = concrete compressive strength i = element number Ixx = second moment of inertia IM = dynamic load allowance MFEM = bending moment at a specific cross section L = span length LL = live-load effect L1 = exterior span length L2 = interior span length mi = absolute average quantity C = capacity Dc = depth of the compression portion of the web fcrw = web stress fR = allowable stress specified in the LRFD code pallow = threshold acceptable percentage p1 = absolute average percentage p2 = maximum absolute average percentage P = permanent load other than dead loads Q = first moment of transformed area of the slab RFLRFR = rating factor based on LRFR provisions Rn = nominal member resistance S = girder spacing Stop = elastic section modulus for the extreme compres- sion fiber t = slab thickness tslab = slab thickness V = shear force zo = location of resultant compressive force in the slab γDC = LRFD load factor for structural components and attachments γDW = LRFD load factor for wearing surfaces and utilities γL = evaluation live-load factor γP = LRFD load factor for permanent loads other than dead loads Ï = element longitudinal stress Ïmax = maximum compressive stress at the extreme com- pression fiber of slab Ïmin = minimum compressive stress at the bottom of the slab θ = skew angle Ï = LRFD resistance factor ÏC = condition factor ÏS = system factor
