▪ 施工级材和标准级材用于结构构件 Construction grade and standard grade used for structural applications
▪ 实用级和经济级材用于非结构构件 Utility grade and economy grade for non-structural applications
▪ 三等 Number 3
▪ 大量用于施工，外观没有要求 Widely used in construction where appearance is not a factor
规格材分等 Grading Lumber
▪ 墙骨柱等级 Stud Grade
▪ 2x4和2x6的墙骨柱用于承受竖向荷载 2x4 and 2x6 rated for vertical loading
规格材分等 Grading Lumber
▪ 加拿大的规格材有目测分等和机械分等(MSR) Lumber in Canada visually graded or machine stress rated (MSR)
▪ 分等依据 Select structural
▪ 高强度 Highest strength ▪ 良好的外观 Best appearance
▪ 可以提高墙体、楼盖和屋顶抵抗振动、 静荷以及地震作用的能力 Contributes to racking, load bearing and earthquake resistance of wall, floor and roof assemblies
▪ 名义尺寸 Nominal dimensions
▪ 2x2, 2x3, 2x4, 2x6, 2x8,2x10,2x12
▪ 实际尺寸 Actual dimensions
▪ 1 ½”x 1 ½” (38mm x 38mm) ▪ 1 ½”x 2 ½” (38mm x 64mm) ▪ 1 ½ ”x 3 ½” (38mm x 89mm) ▪ 1 ½ ”x 5 ½” (38mm x 140mm) ▪ 1 ½ ”x 7 ¼ ” (38mm x 184mm) ▪ 1 ½ ”x 9 ¼ ” (38mm x 235mm) ▪ 1 ½ ”x 11 ¼ ” (38mm x 235mm) ▪ 长度 Lengths ▪ 从2.4m到7.3m，每级增加600mm
Increments of 2 feet (600mm) from 8 ft (2.4 m) to 24 ft (7.3 m)
木基结构材 Wood Based Building Materials
▪ 板材 Boards
▪ 标准尺寸的软木板材 Standard sizes of softwood lumber boards
加拿大木业协会设计师培训班第一阶段 – 轻型木结构 Canada Wood Level 1 - Wood-Frame Construction
构件设计 Framing Components Herbert Otto B. Arch., MRAIC
轻型木结构房屋使用不同的木产品
A Variety of Wood Products are Used to Frame a House
▪ 名义尺寸 Nominal dimensions
▪ 1x2 ▪ 1x3 ▪ 1x4 ▪ 1x6 ▪ 1x8
▪ 实际尺寸 Actual dimensions
▪ ¾” x 1 ½” (19mm x 38mm) ▪ ¾” x 2 ½” (19mm x 64mm) ▪ ¾” x 3 ½” (19mm x 89mm) ▪ ¾” x 5 ½” (19mm x 140mm) ▪ ¾” x 7 ¼ ” (19mm x 184mm)
木基覆面板材 Wood Based Sheathings
▪ 在轻型木结构中广泛使用，也可以和 轻型钢结构一起使用 Widely used in wood-frame construction and in combination with steel framing
▪ 墙骨柱、搁栅和椽条之间的跨度 Spans between studs,joists and rafters
▪ 一等 Number 1
▪ 和上述分等依据相似，但允许出现更大的结疤 Similar to select structural but larger knots
▪ 二等 Number 2
▪ 和一等的强度分等相似，但外观稍差 Similar strength to number 1 but not as good visual appearance
▪ 锯材 Sawn Timber ▪ 胶合材 Plywood
木基结构材 Wood Based Building Materials
▪ 规格材 Dimensioned framing lumber
▪ 轻型木结构使用标准的规格材（软木） Standard dimension softwood lumber used in wood-frame construction
分等机构 Grading Agency 生产厂代码 Mill designation
树种 Species Group 含水率 Moisture Content 指定的等级 Assigned Grade
加拿大轻型木结构 Canadian Wood Frame Housing
根据树种，木材被锯成标准尺寸，并按照 指定的产品强度和性能进行分等 Lumber is sorted by species, sawn into standard sizes and is graded which results in a predictable product with known strength and performance characteristics
分等认证章 Grading Stamps
▪ 规格材每600mm有一个分等认证章 Grading stamps are placed on lumber every 600mm (2 ft.)
▪ 只有经认证的机构才能敲章 Only issued by accredited associations or agencies