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Rolled Steel Joists..BS 4:Part 1 2005
Torsion/ Buckling Parameters


Dimensions and Properties
Designation Mass
per
m		 Depth
of
Section		 Width
of
Section		 Thickness of Root
Radius		 Toe
Radius		 Flange
Taper		 Depth
between
Fillets		 Buckling
Parameter		 Tosional Index Warping Constant Torsional
Constant
M h b (web)s (flange)t r1 r2 a d u x H J'
kg/m mm mm mm mm mm mm Degrees mm � � dm6 cm4
254x203x82 82 254 203,2 10,2 19,9 19,6 9,7 8 166,6 0,89 11 0,312 152
254x114x37 37,1 254 114,3 7,6 12,8 12,4 6,1 8 199,3 0,885 18,7 0,0391 25,2
203x152x52 52,2 203,2 152,4 8,9 16,5 15,5 7,6 8 133,2 0,891 10,7 0,0711 64,9
152x127x37 37,2 152,4 127 10,4 13,2 13,5 6,6 8 94,3 0,866 9,32 0,0183 33,9
127x114x29 29,3 127 114,3 10,2 11,5 9,9 4,8 8 79,5 0,853 8,76 0,00807 20,8
127x114x27 26,8 127 114,3 7,4 11,4 9,9 5 8 79,5 0,868 9,31 0,00788 16,9
127x76x16 16,5 127 76,2 5,6 9,6 9,4 4,6 8 86,5 0,891 11,8 0,00209 6,73
114x114x27 27 114,3 114,3 9,5 10,7 14,2 3,2 8 60,8 0,841 7,92 0,00601 18,9
102x102x23 23 101,6 101,6 9,5 10,3 11,1 3,2 8 55,2 0,836 7,42 0,00321 14,2
102x44x7 7,4 101,6 44,5 4,3 6,1 6,9 3,3 8 74,6 0,872 14,9 0,000178 1,26
89x89x19 19,5 88,9 88,9 9,5 9,9 11,1 3,2 8 44,2 0,83 6,57 0,00158 11,5
76x76x15 15 76,2 80 8,9 8,4 9,4 4,6 8 38,1 0,82 6,42 0,0007 6,84
76x76x13 12,7 76,2 76,2 5,1 8,4 9,4 4,6 8 38,1 0,852 7,21 0,000595 4,6
Designation Mass
per
m		 Depth
of
Section		 Width
of
Section		 Thickness of Root
Radius		 Toe
Radius		 Flange
Taper		 Depth
between
Fillets		 Buckling
Parameter		 Tosional Index Warping Constant Torsional
Constant
M h b (web)s (flange)t r1 r2 a d u x H J'
kg/m mm mm mm mm mm mm Degrees mm � � dm6 cm4
Useful Related Links
  1. Section Properties Notes;... Explains the various properties in the above tables



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