How are the dimensions for a fillet weld given?

Fillet welds may have a size associated with them. This size is called out on the left side of the symbol before the vertical side. The size is indicating the leg length of the weld. If a single size is called out this is specifying that weld should have equal leg sizes.

How do you dimension a weld?

The dimensions of a weld may be added to a drawing in the following manner. Dimensions relating to the cross section of the weld are symbolized by b and are given on the left-hand side of the symbol. The cross-sectional dimension to be indicated for a fillet weld is the leg length.

What is the minimum size of a fillet weld?

Explanation: The minimum size of fillet weld should not be less than 3mm and not more than thickness of thinner part joined.

What is the maximum spacing for intermittent fillet welds?

AWS D1.1 2004 2.11.2-1 states that the maximum longitudinal spacing of intermittent fillet welds shall not exceed 24 times the thinner plate joined.   It is not clear as to whether this is the maximum center to center or is it the un-welded length between the welds.

How big does a fillet weld need to be?

To develop the full strength of a plate using fillet welds, it is necessary that the leg size of the fillet be 3/4 of the plate thickness.

Which is the correct way to place a fillet weld?

The vertical leg of the symbol will always be placed to the left regardless of which way the arrow is pointing. Fillet welds may have a size associated with them. This size is called out on the left side of the symbol before the vertical side. The size is indicating the leg length of the weld.

What should be the spacing between butt welds?

Para 11.2 The toes of adjacent butt welds shall, whenever possible, be no closer than four times the nominal thickness of the pipe. And for attachment welds it states minimum distance between toes of welds S to be the smaller of 2 times the pipe thickness or 40mm.