Find the strength of the joint in tension:
A single U-butt weld (without sealing run) joins two plates of 20 mm and 16 mm thickness correspondingly. Find the strength of the joint in tension if the weld length is 150 mm.
Solution
Because of incomplete penetration effective throat thickness
= (5/8) × t = (5/8) × 16 = 10 mm
Permissible stress in tension in weld = 142 N/mm2
Length of weld = 150 mm
∴ Load carrying capacity of the weld = 10 × 142 × 150
= 213000 N = 213 kN.