跨度表
木材使用库
资源设计价值
指定南方松木材
行业链接
木材分级
Span Tables
Joists & Rafters
Headers and Beams
Headers and Beams : Size Selection Tables
Headers and Beams : Allowable Load Tables
Specifying Southern Pine Lumber
Specification Guidelines
Sizing
Seasoning Requirements
Lumber Grading
Descriptions
Methods
Grade and Quality Marks