bsen1382-1999timberstructurestestmethodswithdrawalcapacityoftimberfasteners

bsen1382-1999timberstructurestestmethodswithdrawalcapacityoftimberfasteners内容摘要：

pes of nails, screws and staples. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. EN 1381, Timber structures 208。 Test methods 208。 Load bearing stapled joints. EN 26891:1991, Timber structures 208。 Joints made with mechanical fasteners 208。 General principles for the determination of strength and deformation characteristics. (ISO 6891:1983) EN 28970, Timber structures 208。 Testing of joints made with mechanical fasteners 208。 Requirements for wood density. (ISO 8970:1989) ISO 3130, Wood 208。 Determination of moisture content for physical and mechanical tests. ISO 3131, Wood 208。 Determination of density for physical and mechanical tests. 3 Definitions For the purposes of this standard, the following definitions apply. staple doublebent, ushaped piece of round, square, rectangular or oval wire with pointed legs staple crown connection between the two staple legs staple leg diameter diameter of a round staple leg or the smaller dimension of a rectangular or oval staple leg staple length length of each staple leg, including point staple width width across the staple legs, see Figure 1 withdrawal parameter parameter measuring the resistance of a timber test piece to the withdrawal of a timber fastener 4 Symbols For symbols relating to staples, see EN 1381. a Staple width, see Figure 1, in millimetres. d Diameter of the smooth plain part of a round nail or screw or the smaller dimension of an oval or rectangular fastener in millimetres. Fmax Maximum withdrawal load in newtons. f Withdrawal parameter in newtons per square millimetre. lp The depth of peration of fastener, including the point, in millimetres. In the case of profiled fasteners, the depth of peration of the profiled part. acrn Angle between the direction of a staple crown and the grain direction or the main direction of the woodbased products, respectively, see Figure 2, in degrees. Figure 1 208。 Staple dimensions Page 4 EN 1382:1999 BSI 121999 Licensed Copy: sheffieldun sheffieldun, na, Mon Oct 30 05:44:52 GMT+00:00 2006, Uncontrolled Copy, (c) BSI NOTE This means that where staples are tested in test pieces of solid timber, the total number of test pieces should be quartered, each quarter of the test pieces being as follows: Figure 2 208。 Angle between the staple direction and the grain direction (1) 5 Materials Timber The timber (solid timber or glued laminated timber) shall be selected in accordance with either of the methods given in EN 28970. Fasteners The specification of nails, screws or staples shall be established. 6 Test methods General The moisture content and density of the timber at test shall be determined as specified in ISO 3130 and ISO 3131 as appropriate. Conditioning The test pieces shall be manufactured with the timber or woodbased products at an equilibrium moisture content corresponding to (20 2) 8C and (65 5) % relative humidity. The material is conditioned when it attains constant mass. Constant mass is considered to be attained when the results of two successive weighings, carried out at an interval of 6 h, do not differ by more than 0,1 % of the mass of the material. For certain inv。