Specification for Structural Steel Buildings

16.1-xxviii
SYMBOLS
Symbol Definition Section
F L Nominal compressive strength above which the inelastic
buckling limit states apply, ksi (MPa) . . . . . . . . . . . . . . . . . . . . . . . . . . . . F4.2
F nBM Nominal stress of the base metal, ksi (MPa) . . . . . . . . . . . . . . . . . . . . . . . . J2.4
F nt Nominal tensile stress from Table J3.2, ksi (MPa) . . . . . . . . . . . . . . . . . . . J3.6
F′ nt Nominal tensile stress modified to include the effects of shear stress,
ksi (MPa) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . J3.7
F nv Nominal shear stress from Table J3.2, ksi (MPa) . . . . . . . . . . . . . . . . . . . . J3.6
F nw Nominal stress of the weld metal, ksi (MPa) . . . . . . . . . . . . . . . . . . . . . . . J2.4
F nw Nominal stress of the weld metal (Chapter J) with no increase in
strength due to directionality of load for fillet welds, ksi (MPa) . . . . . . . . . K5
F SR Allowable stress range, ksi (MPa) . . . . . . . . . . . . . . . . . . . . . . . . . . . . App. 3.3
F TH Threshold allowable stress range, maximum stress range for
indefinite design life from Table A-3.1, ksi (MPa) . . . . . . . . . . . . . . . App. 3.3
F u Specified minimum tensile strength, ksi (MPa) . . . . . . . . . . . . . . . . . . . . . . D2
F y Specified minimum yield stress, ksi (MPa). As used in this
Specification, “yield stress” denotes either the specified minimum
yield point (for those steels that have a yield point) or specified yield
strength (for those steels that do not have a yield point) . . . . . . . . . . . . . . B3.3
F yb Specified minimum yield stress of HSS branch member or plate
material, ksi (MPa) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . K1.1
F yf Specified minimum yield stress of the flange, ksi (MPa) . . . . . . . . . . . . . J10.1
F ysr Specified minimum yield stress of reinforcing steel, ksi (MPa) . . . . . . . . I2.1b
F yst Specified minimum yield stress of the stiffener material, ksi (MPa) . . . . G2.3
F yw Specified minimum yield stress of the web material, ksi (MPa) . . . . . . . . G2.3
G Shear modulus of elasticity of steel = 11,200 ksi (77 200 MPa) . . . . . . . . . E4
H Maximum transverse dimension of rectangular steel member, in. (mm) . 16.3c
H Total story shear, in the direction of translation being considered,
produced by the lateral forces used to compute Δ H , kips (N) . . . . . App. 8.2.2
H Overall height of rectangular HSS member, measured in the
plane of the connection, in. (mm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . K1.1
H b Overall height of rectangular HSS branch member, measured in the
plane of the connection, in. (mm) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . K1.1
I Moment of inertia in the plane of bending, in. 4 (mm 4 ) . . . . . . . . . . App. 8.2.1
I c Moment of inertia of the concrete section about the elastic neutral
axis of the composite section, in. 4 (mm 4 ) . . . . . . . . . . . . . . . . . . . . . . . . . I2.1b
I d Moment of inertia of the steel deck supported on secondary
members, in. 4 (mm 4 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . App. 2.1
I p Moment of inertia of primary members, in. 4 (mm 4 ) . . . . . . . . . . . . . . App. 2.1
I s Moment of inertia of secondary members, in. 4 (mm 4 ) . . . . . . . . . . . . App. 2.1
I s Moment of inertia of steel shape about the elastic neutral axis
of the composite section, in. 4 (mm 4 ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I2.1b
I sr Moment of inertia of reinforcing bars about the elastic neutral
axis of the composite section, in. 4 (mm 4 ) . . . . . . . . . . . . . . . . . . . . . . . . . I2.1b
I st Moment of inertia of transverse stiffeners about an axis in the web
center for stiffener pairs, or about the face in contact with the
web plate for single stiffeners, in. 4 (mm 4 ) . . . . . . . . . . . . . . . . . . . . . . . . . G2.3
Specification for Structural Steel Buildings, July 7, 2016
AMERICAN INSTITUTE OF STEEL CONSTRUCTION