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Chapter 13
Sill and Floor Construction
| Term | Definition |
|---|---|
| Balloon Framing | A method of framing in which the wall studs rest directly on the sill plate and each floor hangs from the studs. |
| Beam | A structural member that supports the joists and effectively reduces the span. |
| Box Sill | Consists of a 2" x 6" plate called a sill or mudsill and a header that is the same size as the floor joists. |
| Cantilevered Joists | Required when the floor joists are parallel to the overhanging (cantilevered) area. |
| Cement Mortar Mix | A mixture of one part Portland cement and six parts sand. |
| Chords | The horizontal flanges at the top and bottom of a truss. |
| Cross Bridging | Used to stiffen the floor and spread the load over a broader area. |
| Curtain Walls | The walls of a post and beam building; do not support much weight. |
| Engineered Wood Products (EWP) | Wood veneers and fibers are combined with adhesives to form beams, headers, joists, and panels that have uniformly high quality and strength. |
| Floor Trusses | Consist of a top chord, bottom chord, and web; often used to place of floor joists in residential structures. |
| Glulam Beams | Glue-lamented members that consist of 1x and 2x lumber glued in stacks to the desired shape and size. |
| Joists | Provide support for the floor. |
| Laminated Veneer Lumber (LVL) | An engineered wood product in which veneers of wood are stacked in parallel and glued under pressure. |
| Longitudinal Method | A method of post and beam construction where the beams are placed at right angles to the roof slope and the roof decking is laid from the ridge pole to the eaves line. |
| Mudsill | The sill in box sill construction. |
| Oriented Strand Board (OSB) | An engineered wood product in which long strands of wood are mixed with resin, placed in layers, and pressed and cured. |
| Parallel Strand Lumber (PSL) | An engineered wood product in which thin strands of wood are glued together under pressure. |
| Platform Framing | A method of framing where the floor joists form a platform on which the walls rest. |
| Post and Beam Construction | Uses posts, beams, and planks as framing members that are larger and spaced farther apart than conventional framing members. |
| Sill | The lowest member of the frame of a structure, it rests on the foundation and supports the floor joists or the studs of the wall; designed to drain water away and provide support for the side jambs. |
| Subfloor | Affixed to the floor joists; provides the surface on which the underlayment for the final finished floor will rest. |
| Transverse Method | A method of post and beam construction where the beams follow the roof slope and the roof decking runs parallel to the roof ridge. |
| Web | The framework between the chords. |
| Wood I-Beams | Typically made from 2" x 4" machine-stressed lumber or LVL flanges to receive a 3/8" OSB or plywood web that is glued in place. |