BS 15416-1:2017 pdf download – Adhesives for load bearing timber structures other than phenolic and aminoplastic — Test methods Part 1 : Long-term tension load test per- pendicular to the bond line at varying climate conditions with specimens perpendicular to the glue line (Glass house test) 5 Method 5.1 General The specimens shall be produced following EN 302-3, but with specimens made from untreated beech wood (Fagus sylvatica L.) with close contact and 0,5 mm thick glue line for application areas “Special purpose” and “General purpose”, and a close contact glue line for application area “Finger joints”. 5.2 Selection of timber The beech wood boards from which the specimens are cut shall be free from knots, straight grained and shall have a density of (700 ± 50) kg/m 3 at 12 % moisture content. The timber prior to specimen manufacture shall be conditioned in a climate chamber at storage conditions of (20 ± 2) °C and (65 ± 5) % relative humidity (hereafter climate [20/65]). The moisture content shall be (12 ± 1) %. Each beech wood board shall have a width of at least 150 mm, a length of at least 750 mm and a thickness of at least 35 mm, and shall be used to manufacture one test stick as shown in Figure 3, a) and b). The annual ring orientation of both components glued together shall be roughly co-linear and with an angle of the growth rings in the range of 30° and 60°. 5.3 Production of the test sticks In total, 5 sticks with a cross section of 50 mm × 60 mm (after bonding and final preparation) and a length of at least 700 mm, enabling the cutting of 8 test specimens and 2 spare specimens from each stick of the specimen type described in EN 302-3, shall be manufactured for each glue line thickness. Alternatively, longer sticks can be pre-assembled into sub-sections of at least 300 mm prior to bonding, providing sufficient matched samples for cutting the required number of specimens. Not more than 8 h before the bonding, the boards are planned to their final thickness. For test pieces with a 0,5 mm thick glue line, each stick is prepared in an appropriate manner to ensure that the correct glue line thickness is achieved and to ensure that there is no loss of adhesive during the bonding of the test sticks. The manufacture...

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