Geometric parameters Qingyuan steel

　　A - gross cross-sectional area;
An-- net cross-sectional area;
Height H-- column;
H1, H2, H3-- stepped column, middle (or single-stage column next paragraph), the height of the lower section;
I - hair-sectional moment of inertia;
It-- Mao sectional torsional moment of inertia;
Iw-- hair-sectional moment of inertia of the fan;
In-- net section moment of inertia;
S - gross moment of area;
W - Gross section modulus;
Wn-- net section modulus;
Wp-- gross plastic section modulus;
Wpn-- plastic net section modulus;
ag - spacing gap;
Free b-- plate or sheet width outrigger width;
bo-- box section flange plate in unsupported web width between; concrete slab width of the top bracket;
bs-- stiffener extended width;
Effective width be-- board member;
d - diameter;
de-- effective diameter;
do-- aperture;
e - eccentricity;
h - cross section of full height; floor height;
Hc1-- thickness of the concrete slab;
hc2-- torr concrete slab thickness;
He-- calculating the thickness of the fillet weld;
hf-- fillet weld leg size;
hω-- web height.
Ho-- calculate the height of the web;
i - sectional radius of gyration;
l - length or span;
ll-- beam compression flange distance between the lateral support; bolts (or rivets) to connect the length direction of the force;
lo-- bending buckling effective length;
lω-- torsional buckling length calculation;
lw-- calculate the length of the weld;
lz-- concentrated load calculations assume that the distribution of the length of the height of the edge of the web;
s-- partial penetration butt weld groove to the root of the weld surface of the shortest distance;
Competent wall thickness; thickness t-- plate;
ts-- stiffener thickness;
Tw-- web thickness;
α - angle;
θ - angle; stress diffusion angle;
γb-- beam web thickness ratio by the general calculation of bend;
γs-- beam web thickness ratio by the general calculation of shear;
γc-- beam web thickness ratio that is common when the partial pressure calculation;
γ - slenderness ratio;
γo, γyz, γz, γuz-- conversion slenderness ratio,