Lufkin Red End Modular Spacing Rulers

• All sections have square ends
• Every joint opens on even number
• Inside marked with 6 scales in a 16 in module
• Scales are as follows: two courses in 16 in space (for concrete blocks and glass blocks)
• Three courses in 16 in space (for facing tile)
• Four courses in 16 in space (for Roan brick)
• Scales include mortar space and spacing for 6 in and 12 in blocks
• Outside is graduated on both edges to 1/16ths
• First end section is a short section which permits butting the rule on the first 16 in module