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Official Journal of the Japan Wood Research Society

Table 2 Average and lower limit of bending Young’s modulus of elasticity of laminae

From: Effects of the width and lay-up of sugi cross-laminated timber (CLT) on its dynamic and static elastic moduli, and tensile strength

Layers in CLT

Lamina grade

 

Bending Young’s modulus (kN/mm2)

Average

Lower limit

Outer-layer

M60A

Measured value

7.09 (12.6)

5.4

JAS Ref. [2]

6.0

5.0

Inner-layer

M30A

Measured value

5.58 (8.9)

4.6

JAS Ref. [2]

3.0

2.5

  1. Value in bracket shows the coefficient of variation, in  %. JAS reference indicates the reference value provided by the Japanese Agricultural Standard for Cross-laminated timber [2]. Measured value of lower limit was based on 5 % parametric tolerance limit for normal distribution with 75 % confidence