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The angle of slope varies according to the wood used, purpose of joint and type of work. Typically the slope is 1:6 for softwoods, and a shallower 1:8 slope for hardwoods. Often a slope of 1:7 is used as a compromise. However, a different slope does not affect the strength of the joint in different types of wood. [4]
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A carpenter uses a chain mortiser to cut a large mortise A worker uses a large circular saw to cut joints. Joinery is a part of woodworking that involves joining pieces of wood, engineered lumber, or synthetic substitutes (such as laminate), to produce more complex items.
French cleat on a wall (left) and correspondingly on a shelf to be hung up (right). A French cleat is a way of securing a cabinet, mirror, tools, artwork or other objects to a wall. [1]
A double floor is a floor framed with joists supported by larger timbers.. In traditional timber framing there may be a single set of joists which carry both a floor and ceiling called a single floor (single joist floor, single framed floor) or two sets of joists, one carrying the floor and another carrying the ceiling called a double floor (double framed floor).
However, α=45° will be stronger than α=90° if shear strength is greater than σ/2. The joint is strongest between these two angles at 63.4°. The joint becomes stronger than 63.4° at 25.4°. At a shallow enough angle, strength of the joint continues to increase and failure will occur anywhere in the two pieces, most likely outside the joint.