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BS EN 16254:2023 – TC

BS EN 16254:2023 – TC

$186.33

Tracked Changes. Adhesives. Emulsion polymer isocyanate (EPI) for load-bearing timber structures. Classification and performance requirements

Published By Publication Date Number of Pages
BSI 2023 54
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This document establishes a classification for emulsion polymer isocyanate (EPI) adhesives according to their suitability for use in load-bearing timber products in defined climatic exposure conditions, and specifies performance requirements for such adhesives for the industrial manufacture of load-bearing timber products only. The performance requirements of this document are applicable to the adhesives only, not to the timber products. This document does not cover the performance of adhesives for on-site gluing (except for factory-like conditions) or the production of wood-based panels, except solid wood panels, or modified and stabilized wood with considerably reduced swelling and shrinkage properties, e.g. acetylated wood, heat treated wood and polymer impregnated wood. This document is primarily intended for use by adhesive manufacturers and for use in timber products bonded with adhesives, to assess or control the quality of adhesives. This document only specifies the performance of an adhesive for use in an environment corresponding to the defined conditions. Such an adhesive meeting the requirements of this document for its type is adequate for use in load-bearing timber products, provided that the bonding process has been carried out according to an appropriate product standard.

PDF Catalog

PDF Pages PDF Title
1 30470835
31 A-30444355
32 undefined
38 1 Scope
2 Normative references
39 3 Terms and definitions
40 4 Classification
42 5 Requirements
5.1 General
5.2 Bond strength in longitudinal tensile shear test
43 5.3 Resistance to delamination
44 5.4 Tensile strength perpendicular to the bond line after climatic treatment (acid damage test)
5.5 Effect of wood shrinkage on the shear strength
5.6 Static load test of multiple bond line specimens in compression shear
45 5.7 Creep deformation test at cyclic climate conditions with specimens loaded in bending shear
5.8 Long term sustained load test at cyclic climate conditions with specimens loaded perpendicular to the bond line (“Glass house test”)
5.9 Delamination test on finger-jointed test pieces
6 Test methods
6.1 General
6.2 Determination of bond strength in longitudinal tensile shear test
6.3 Determination of resistance to delamination
6.4 Determination of tensile strength perpendicular to the bond line after climatic treatment (acid damage test)
6.5 Determination of the effect of wood shrinkage on the shear strength
46 6.6 Static load test of multiple bond line specimens in compression shear
6.7 Creep deformation test with specimens loaded in bending shear
6.8 Long term sustained load test at cyclic climate conditions with specimens loaded perpendicular to the bond line (“Glass house test”)
6.9 Delamination test on finger-jointed test pieces
7 Working properties of the adhesive
7.1 General
7.2 Determination of working life under reference conditions
47 7.3 Determination of open assembly time under reference conditions
7.4 Determination of pressing time under reference conditions
8 Marking and labelling
48 Annex A (normative)Delamination test for bonding of finger-joints
A.1 Production of the specimens
49 A.2 Testing
A.3 Expression of results
50 A.4 Test report
A.4.1 Adhesive
A.4.2 Preparation of test pieces and testing procedure
A.4.3 Test results
51 Annex B (informative)Product limitations and glulam production control for beams produced with Small dimension adhesives
B.1 Product limitations
B.2 Control of the glue line thickness

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BS EN 16254:2023 - TC
$186.33