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In this traditional floor construction, the ends of joists or beams are built into the walls of a block building, and are therefore directly supported by the wall structure. Sometimes joist ends rest on wooden wall plates secured to the wall surface. Old lumber joists secured within a wall may eventually become damp, and might need replacing over time. Joist size can vary according to the floor span, and this is an important consideration when building a new house or creating an addition. Shown here, the joists are braced using herringbone struts and blocking, and are covered using straight-edged or tongue-and-groove boards.
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