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Tongue and groove joints allow two flat pieces to be joined strongly together to make a single flat surface. Before plywood became common, tongue and groove boards were also used for sheathing buildings and to construct concrete formwork. A strong joint, the tongue and groove joint is widely used for re-entrant angles
The carpentry consists of a timber frame with vertical planks extending from sill to plate. Sometimes there are studs at the doors but mostly the vertical planks replace the studs. Both wood shingle or clapboard exterior siding and interior lath and plaster attach directly to the planks. [10]
Unseasoned wood or freshly harvested timber, usually with a high moisture content. grit The grade of particles in sandpaper or sharpening stones which determines the aggressiveness of the cut. groove A slot or channel made with the grain, usually on the end-grain in preparation for a tongue and groove joint. grooving
Clapboard (/ ˈ k l æ b ə r d /), also called bevel siding, lap siding, and weatherboard, with regional variation in the definition of those terms, is wooden siding of a building in the form of horizontal boards, often overlapping. Contemporary use of clapboard/weatherboard and corrugated galvanised iron in Australia
Matchboarding can be used both internally and externally, and can be layered in many different styles including: square edge, feather edge, ship lap and tongue and groove. [ 2 ] [ 3 ] Matchboard was most popular in the late Victorian period , when woodworking machinery had developed that could cut the edge joints quickly and cheaply.
The joint is formed by cutting opposing tapered ends on each member which are then fitted together. When working with wood, this gives better long grain to long grain gluing surface, which yields a stronger joint than would be achieved with a simple butt joint. The tapers are generally cut at an angle between 1:8 to 1:10.
For both of these rules of thumb (85%/90% and major minus pitch), the tap drill size yielded is not necessarily the only possible one, but it is a good one for general use. The 85% and 90% rules works best in the range of 1 ⁄ 4 –1 in (6.4–25.4 mm), the sizes most important on many shop floors.
Wood will expand and contract across the grain, and a wide panel made of solid wood could change width by a half of an inch, warping the door frame. By allowing the wood panel to float, it can expand and contract without damaging the door. A typical panel would be cut to allow 1/4" (5 mm) between itself and the bottom of the groove in the frame.