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TABLE D1.3-1(B)<br />
FIRE ENGINEERING DESIGN<br />
EXPOSED SURFACE AREA TO MASS RATIO (m 2 /t)<br />
DuraGal RECTANGULAR HOLLOW SECTIONS: GRADE C450L0<br />
Standard Thickness<br />
about y-axis<br />
1 = TOTAL PERIMETER, PROFILE-PROTECTED<br />
2 = TOTAL PERIMETER, BOX-PROTECTED, NO GAP<br />
3 = TOTAL PERIMETER, BOX-PROTECTED, 25mm GAP<br />
4 = TOP FLANGE EXCLUDED, PROFILE-PROTECTED<br />
5 = TOP FLANGE EXCLUDED, BOX-PROTECTED, NO GAP<br />
6 = TOP FLANGE EXCLUDED, BOX PROTECTED, 25mm GAP<br />
Designation<br />
Mass<br />
d b t per m<br />
1 2 3 4 5 6<br />
mm mm mm kg/m<br />
150 x 50 x 6.0 RHS 16.7 22.4 23.9 35.8 15.2 14.9 20.9<br />
5.0 RHS 14.2 26.6 28.1 42.1 17.8 17.6 24.6<br />
4.0 RHS 11.6 32.9 34.4 51.6 21.7 21.5 30.1<br />
3.0 RHS 8.96 43.5 44.7 67.0 28.1 27.9 39.1<br />
2.5 RHS 7.53 52.0 53.1 79.7 33.4 33.2 46.5<br />
2.0 RHS 6.07 64.7 65.9 98.8 41.3 41.2 57.6<br />
125 x 75 x 6.0 RHS 16.7 22.4 23.9 35.8 16.7 16.4 22.4<br />
5.0 RHS 14.2 26.6 28.1 42.1 19.6 19.3 26.3<br />
4.0 RHS 11.6 32.9 34.4 51.6 23.9 23.7 32.3<br />
3.0 RHS 8.96 43.5 44.7 67.0 30.9 30.7 41.9<br />
2.5 RHS 7.53 52.0 53.1 79.7 36.7 36.5 49.8<br />
2.0 RHS 6.07 64.7 65.9 98.8 45.5 45.3 61.7<br />
100 x 50 x 6.0 RHS 12.0 22.8 24.9 41.6 17.0 16.6 24.9<br />
5.0 RHS 10.3 27.0 29.1 48.5 19.7 19.4 29.1<br />
4.0 RHS 8.49 33.3 35.4 58.9 23.9 23.6 35.4<br />
3.5 RHS 7.53 37.9 39.9 66.4 26.9 26.6 39.9<br />
3.0 RHS 6.60 43.9 45.5 75.8 30.6 30.3 45.5<br />
2.5 RHS 5.56 52.4 53.9 89.8 36.2 35.9 53.9<br />
2.0 RHS 4.50 65.1 66.6 111 44.7 44.4 66.6<br />
1.6 RHS 3.64 81.0 82.5 138 55.3 55.0 82.5<br />
75 x 50 x 6.0 RHS 9.67 23.2 25.8 46.5 18.5 18.1 28.4<br />
5.0 RHS 8.35 27.4 29.9 53.9 21.4 20.9 32.9<br />
4.0 RHS 6.92 33.7 36.1 65.1 25.7 25.3 39.8<br />
3.0 RHS 5.42 44.2 46.1 83.0 32.6 32.3 50.7<br />
2.5 RHS 4.58 52.7 54.5 98.2 38.5 38.2 60.0<br />
2.0 RHS 3.72 65.4 67.2 121 47.4 47.1 74.0<br />
1.6 RHS 3.01 81.3 83.1 150 58.5 58.2 91.4<br />
75 x 25 x 2.5 RHS 3.60 53.1 55.5 111 35.1 34.7 62.5<br />
2.0 RHS 2.93 65.8 68.2 136 43.0 42.6 76.7<br />
1.6 RHS 2.38 81.7 84.0 168 52.9 52.5 94.5<br />
65 x 35 x 4.0 RHS 5.35 34.2 37.4 74.8 25.8 25.3 44.0<br />
3.0 RHS 4.25 44.7 47.1 94.2 32.2 31.8 55.4<br />
2.5 RHS 3.60 53.1 55.5 111 37.9 37.5 65.2<br />
2.0 RHS 2.93 65.8 68.2 136 46.4 46.0 80.1<br />
50 x 25 x 3.0 RHS 3.07 45.5 48.9 114 33.1 32.6 65.2<br />
2.5 RHS 2.62 54.0 57.2 134 38.7 38.2 76.3<br />
2.0 RHS 2.15 66.6 69.8 163 47.1 46.5 93.1<br />
1.6 RHS 1.75 82.5 85.6 200 57.6 57.1 114<br />
50 x 20 x 3.0 RHS 2.83 45.8 49.4 120 32.4 31.8 67.1<br />
2.5 RHS 2.42 54.2 57.7 140 37.7 37.1 78.4<br />
2.0 RHS 1.99 66.8 70.3 171 45.8 45.2 95.4<br />
1.6 RHS 1.63 82.7 86.1 209 55.9 55.3 117<br />
See page D1-7 for details of the cases of fire exposure considered.<br />
DuraGal DESIGN CAPACITY TABLES<br />
DCTDHS/06<br />
D1-18 for STRUCTURAL STEEL HOLLOW SECTIONS MARCH 2002
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