What is the minimum size of filled weld for steel plate with thickness of 1 inch

Question

What is the minimum size of filled weld for steel plate with thickness of 1 inch? In the formula for calculating the block shear strength of bolt connection, i.e. Eq 3.9.4 on the text book, it contains 0.6F, what is the physical meaning of 0.6 F? If bolt diameter is d_b = 1", what is the typically used spacing between bolts in the bolt connection? For a plate subject to load. the design tension is T = 100 kips, it is found that nominal tension capacity of the plate is T_s = 120 kips and the corresponding strength reduction factor for the tension failure mode phi = 0.75. to determine whether the plate can resist the load When designing a weld connection for two plates, what types of failure modes should you consider and exam (name all possible failure modes)? For the bolt connection shown below. to draw a possible failure mode of the block shear of plate A in the Fig below? For the bolt connection shown below, to draw a possible failure mode of the pure tension of plate A in the figure?

Explanation / Answer

1) For Thicknesses Over 3/4 inch the minimum size of the weld is 5/16 in.

Hence for 1 in, the minimum size of the weld is 5/16 in.

2) 0.6 Fy represents  net section fracture strength on shear path

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