Which combination of factors makes edge joints less suitable for high-load applications?
Limited weld area and reduced joint strength
An edge joint is formed by placing two metal pieces so their edges are aligned side by side, and the weld is deposited along those meeting edges.
Because only the thin edges are joined, the actual weld area (the cross-section of metal that carries load) is small compared with joints such as butt or fillet joints.
A small weld area means the joint can transmit only a limited force before it fails, so its overall load-carrying strength is low.
For components that must bear heavy or repeated (high) loads, this combination of a limited weld area and the resulting reduced joint strength makes the edge joint unsuitable.
Hence, the answer is Limited weld area and reduced joint strength.
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