Single Strap Joint

A single strap joint is a type of butt joint in which only one cover plate is bonded on the main plate. This configuration allows for the increase of the contact surface for the butt joint and limits the peel forces exerted on the joint with respect to the ‘strapped’ side of the substrates.

This type of joint is subject to resisting bending and shear forces. The main weakness of this joint is the stresses of 90 degrees perpendicular to the substrate applied to the ‘strapped’ side of the joint.

Figure 109 Single strap joint Double Strap Joint

A double strap joint uses two belts or straps to reinforce the joint. A strap is bonded to each side of the main substrate along the entire length of the bond. Not only does this type of joint make it possible to increase the bonded contact surface significantly, but it also greatly improves the mechanical and bending strength of the joint when compared to other joints. Though this is a very strong joint, aesthetic considerations may eliminate this joint from consideration.

Figure 110 Double strap joint

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