Two methods for the selection of the density of wood for specimens to be used in determining strength and stiffness properties are specified, which are equally applicable. It is assumed that the wood density is normally distributed with a coefficient of variation of about 0.15 and that the density is only one of the properties influencing the strength of a joint. The other relevant properties, e.g. growth ring size and slope of grain, are not included.
Số hiệu tiêu chuẩn
EN 28970
Tên tiêu chuẩn
Timber structures; testing of joints made with mechanical fasteners; requirements for wood density (ISO 8970:1989)
Ngày phát hành
1991-02-00
Tiêu chuẩn tương đương
NF P21-313*NF EN 28970 (1991-08-01), IDT * DIN EN 28970 (1991-07), IDT * NBN ISO 8970 (1992), IDT * BS EN 28970 (1991-07-31), IDT * EN 28 970, IDT * EN 28970 (1992), IDT * ISO 8970 (1989-07), IDT * UNI EN 28970, IDT * SN EN 28970 (1991), IDT * OENORM EN 28970 (1991-08-01), IDT * PN-EN 28970 (1997-04-25), IDT * SS-EN 28970 (1991-10-16), IDT * UNE-EN 28970 (1992-12-10), IDT * DS/EN 28970, IDT * IST L 205/EN 28970 (1991), IDT * NS-ISO 8970 (1991), IDT * STN EN 28970 (1995-02-01), IDT * CSN EN 28970 (1994-07-01), IDT * DS/EN 28970 (1994-08-04), IDT * NEN-ISO 8970:1991 en (1991-06-01), IDT
Từ khóa
Bulk density * Construction * Density * Fasteners * Joints * Mechanical testing * Number density * Structural timber * Test specimens * Testing * Timber construction * Timber joints
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EN 28970
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