BS 1383:2016 pdf download – Timber structures — Test methods — Pull through resistance of timber fasteners
1 Scope
This European Standard specifies the test method for determining the resistance of timber to the head pull through of timber fasteners.
In this standard ‘timber’ includes solid timber, glued laminated timber and wood-based products.
The test method applies to all types of nails, screws and staples excluding screws with fully threaded shank.
2 Normative references
The following documents, in whole or in parts, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 322, Wood-based panels – Determination of moisture content
EN 323, Wood-based panels – Determination of density
EN 14592, Timber structures – Dowel-type fasteners – Requirements
EN 26891:1991, Timber structures – Joints made with mechanical fasteners – General principles for the determination of strength and deformation characteristics (ISO 6891:1983)
EN ISO 8970:2010, Timber structures – Testing of joints made with mechanical fasteners – Requirements for wood density (ISO 8970:2010)
ISO 13061-1, Physical and mechanical properties of wood — Test methods for small clear wood specimens — Part 1: Determination of moisture content for physical and mechanical tests
ISO 13061-2, Physical and mechanical properties of wood — Test methods for small clear wood specimens — Part 2: Determination of density for physical and mechanical tests
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
double-bent, u-shaped piece of round, square, rectangular or oval wire with pointed legs
staple crown
connection between the two staple legs
staple leg diameter
nominal diameter of a round staple leg, the side length of a rectangular leg, or the diameter of an oval cross section as defined in EN 14592
staple length
length of each staple leg, including point
staple crown width
width across the staple legs
head pull through parameter
parameter measuring the resistance of a timber test piece to the pulling through of the head of a timber fastener or the crown of a staple
Note 1 to entry See Figures 1 and 2.
Note 2 to entry For other timber fasteners the definitions of EN 14592 apply.
4 Symbols and abbreviations
For the purposes of this document, the following symbols and abbreviations apply.
a staple crown width, see Figure 1, in millimetres
5 Materials
5.1 Timber and wood-based products The solid timber shall be selected in accordance with the method given in EN ISO 8970:2010. The specification of the LVL, glued laminated timber and wood-based products shall be established. The products used for the individual test pieces shall be representative of the class or range of product to which they belong and the relevant properties shall be declared.
5.2 Fasteners The specification of nails, screws or staples shall be established.
6 Test methods
6.1 General The moisture content and density of the timber or wood-based products at test shall be determined as specified in ISO 13061-1, ISO 13061-2, EN 322 and EN 323 as appropriate.
6.2 Conditioning The test pieces shall be manufactured with the timber or wood based products at an equilibrium moisture content corresponding to (20 ± 2) °C 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 weightings, carried out at an interval of 6 h, do not differ by more than 0, 1 % off the mass of the material. For certain investigations other moisture conditioning can be appropriate, and shall be reported.
6.3 Fabrication of test pieces The axis of the fastener shall be perpendicular to the surface, see Figure 3. The insertion of fasteners shall follow normal preparation (e.g. pre-boring) and practice. The test piece size shall be as given in Table 1. Where the test pieces are of solid timber, half of the fasteners shall be inserted radially to the growth rings and half tangentially to the growth rings. Test shall be made with test pieces with α crn = 30°. If wood-based products are included in the test piece the test shall be carried out at either α crn = 30° or α crn = 60°, whichever gives the smallest load carrying capacity.BS 1383 pdf download.