Improving Scarf Joint Strength

A reservoir-type bonding technique, which was developed for improving end-grain to end-grain butt-joint gluing of wood with epoxy resins, has been applied successfully to the gluing of scarf joints. It is shown that for practical purposes the full tensile strength of the timber (kauri) may be obtained with a scarf as steep as 1 in 4. A comparison of the results with other published data has shown the superiority of this new method.

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