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# A triple riveted butt joint with equal double cover plates (zig-zag riveting) is used for the...

A triple riveted butt joint with equal double cover plates (zig-zag riveting) is used for the longitudinal joint of a Lancashire boiler of 2.5 m internal diameter. The working steam pressure is 1.12 N/mm2 and the efficiency of the joint is 85 per cent. Calculate the plate thickness for mild steel of 460 MPa ultimate tensile strength. Assume ratio of tensile to shear stresses as 7/6 and factor of safety 4. The resistance of the rivets in double shear is to be taken as 1.875 times that of single shear. Design a suitable circumferential joint also.

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• ### QUESTION 1 A double riveted double cover butt joint in plates 24 mm thick is made...

QUESTION 1 A double riveted double cover butt joint in plates 24 mm thick is made with 15 mm diameter rivets at 99 mm pitch. The permissible stresses is tension, shear and compression are is 130 Mpa, 117 MPa & 134 MPA respectively. Find the Tearing resistance of the plate in N