![Lag Screw Connection Design Based on NDS 2005 1 Lag Screw Connection Design Based on NDS 2005](https://excel.civilmdc.com/wp-content/uploads/2021/12/Lag-Screw-Connection-Design-Based-on-NDS-2005.png)
Also known as lag bolts, lag screws are one of the toughest construction fasteners in the industry. Lag screws are massive; they are typically at least one inch long and ΒΌ-inch thick. The screws have course, sharp treading that only encompasses part of the bolt, which allows you to adjust it.