2×4 Building Code Revisions Permit More Flexible Designs
The MLIT* Notifications 1540 and 1541, known as 2×4 building code, were revised on August 4th and enacted immediately. As part of a number of code changes the wood frame wall alignment rule was revised. Up until recently this rule had prescriptively stipulated a requirement for 900 mm or longer of continuous shear wall length. However, designers have long been looking for the flexibility of using shorter wall lengths especially in the corner window openings where the architects would be better able to capture scenic views or natural light from the outside. The newly revised code allows for these shorter walls as long as the total length of both sides at the corner achieves 900 mm or longer.
Note: *Ministry of Land, Infrastructure, Transport and Tourism