The Effect of Nailing Patterns on Mechanically Laminated Built-Up Columns

This research examines the structural capacity of 2x lumber built-up columns, focusing on the impact of nailing patterns. Current standards allow significant variation in nail spacing and quantity. Additional nails may introduce localized deformations in individual plies, potentially reducing overall column strength. To evaluate this effect, built-up columns will be tested under different nailing patterns to quantify capacity reductions due to additional nails and tighter spacing. The findings aim to improve strength predictions for built-up columns, enhancing building safety, optimizing material use, and refining structural engineering guidelines.