Design an unequal angle section to serve as a tie member of 1.6 m length in a roof truss. It has to carry an axial load of 118 kN. The gusset plate is connected to the longer leg of the angle. Also design the fillet weld. Permissible stress in weld = 108 N/mm² Permissible stress in axial tension = 150 N/mm² Thickness (t), sectional area (A), weight/m run (w), distance of centres of gravity along x-axis and y-axis. (c, and cy), maximum and minimum radius of gyration max and min are given for some angles for design. Angle 80 × 50 90 × 60 t 6 8 10 6 8 10 A 746 5.9 978 W 1202 7.7 Cx Cy 865 6.8 26.4 27.3 max 11.6 26.9 1137 8.9 29.6 min 10.7 9.4 28.1 13.2 26.3 10.6 12.4 26.6 10.6 28.7 13.9 30.7 12.8 14.8 30.4 12.7 1401 11.0 30.4 15.5 30.1 12.7
Design an unequal angle section to serve as a tie member of 1.6 m length in a roof truss. It has to carry an axial load of 118 kN. The gusset plate is connected to the longer leg of the angle. Also design the fillet weld. Permissible stress in weld = 108 N/mm² Permissible stress in axial tension = 150 N/mm² Thickness (t), sectional area (A), weight/m run (w), distance of centres of gravity along x-axis and y-axis. (c, and cy), maximum and minimum radius of gyration max and min are given for some angles for design. Angle 80 × 50 90 × 60 t 6 8 10 6 8 10 A 746 5.9 978 W 1202 7.7 Cx Cy 865 6.8 26.4 27.3 max 11.6 26.9 1137 8.9 29.6 min 10.7 9.4 28.1 13.2 26.3 10.6 12.4 26.6 10.6 28.7 13.9 30.7 12.8 14.8 30.4 12.7 1401 11.0 30.4 15.5 30.1 12.7
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Design an unequal angle section to serve as a
tie member of 1.6 m length in a roof truss. It
has to carry an axial load of 118 kN. The gusset
plate is connected to the longer leg of the angle.
Also design the fillet weld.
Permissible stress in weld = 108 N/mm²
Permissible stress in axial tension = 150 N/mm²
Thickness (t), sectional area (A), weight/m run
(w), distance of centres of gravity along x-axis
and y-axis. (c, and cy), maximum and minimum
radius of gyration max and min are given for
some angles for design.
Angle
80 × 50
90 × 60
t
6
8
10
6
8
10
A
978
W
746 5.9 26.4
7.7
1137
Cx Cy
865 6.8
1202 9.4 28.1
27.3
28.7
8.9 29.6
11.6 26.9
max
13.9
12.4 26.6 10.6
14.8
min
13.2 26.3 10.6
10.7
30.7
12.8
30.4 12.7
1401 11.0 30.4 15.5 30.1 12.7
solve in handwritten only
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