What is the maximum gap allowed between sill and sill?

The maximum gap allowed between sills is typically set to ensure structural integrity and proper load transfer in construction. A gap of 1 1/2 inches provides adequate spacing to accommodate potential expansion, settling, or movement without compromising the structural connection between the elements. This limit is generally established based on building codes that aim to promote safety and durability in structures.

Having a gap larger than this could lead to issues such as increased vulnerability to water infiltration, reduced structural support, or challenges in maintaining alignment among structural components. Proper attention to the specified gap ensures that the integrity of the construction is maintained while allowing for some degree of movement due to environmental factors. Hence, the selection of 1 1/2 inches aligns with accepted engineering practices and building regulations.