Bed Joint Width

The Bed Joint Width calculator returns the decimal inch equivalent bed joint width in inches from a selection of standard bed joint sizes.  

INSTRUCTIONS: Enter the following:

• (joint) Choose 1/4, 5/16, 3/8, 7/16, 1/2

Bed Joint Width: The calculator returns the decimal equivalent of the selection.

This equation is used as an EiE¹ support equation to a number of other masonry equations which need the head joint width selection as an input. 

This equation assumes the size of the joint is between 1/4 inch and 1/2 inch.  Smaller than 1/4 inch joints are difficult to properly finish (strike) and larger than half inch bed joints can decrease flex and compressive strength of the wall.

The input to this equation is the selection from the following head joint widths:

1/4, 5/16, 3/8, 7/16, 1/2

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