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Notes Coordinating these components is critical to avoid trapping water vapor in the wall cavity. The principle to follow is that the permeability (the degree to which water vapor will pass through a material) must be higher for materials on the cool side of the wall (usually the outside) than for materials on the warm […]

(і 11 11   PLywOOD FLOOR diaphragm   SHEAR wALL SHEATHING LAPS RIM jOIST, OR FRAMING ANCHOR TIES DIAPHRAGM TO SHEAR wALL STRUT.   FOUNDATION WALL OR FLOOR ; ! STRUCTURE   Double TOP PLATE ACTING AS A SHEAR wALL STRUT   SPECIAL ANCHOR BOLT EMBEDDED IN FOUNDATION AND/OR CARRIED THROUGH FLOOR STRUCTURE PER MANUFACTURER’S […]

Structural Sheathing SINGLE-WALL CONSTRUCTION SINGLE-WALL CONSTRUCTION 8-Ft. Panel with Water Table NON-STRUCTURAL SHEATHING. FULL-SIZE PANELS (AFT. X 8FT., 9FT, OR 10FT.) CAN PROVIDE STRUCTURAL sheathing and/or FIRE resistance. Many sheet materials that can be used for sheathing do not provide adequate lateral bracing. In addition to providing a base for a moisture barrier and siding, […]

Construction terms vary regionally, and the names for the components that frame wall openings (see 68A) are the least cast in stone. Studs called “trimmer studs” in one locality are called “jack studs” in another; and the bottom plate may go by either “bottom plate” or “sole plate.” Consult local builders and architects for common […]

Once the stud size and spacing and the framing system have been selected, it is time to consider how to brace the building to resist the forces of wind, earthquakes, and eccentric loading. Will diagonal bracing be ade­quate, or should the building be braced with structural sheathing and/or shear walls? This question is best answered […]

T he walls of a building serve several important functions: They define the spaces within the building to provide privacy and zoning, and they enclose the building itself, keeping the weather out and the heat or cold in. Walls provide the vertical structure that supports the upper floors and roof of the building, and the […]

FRAMED WALL WiTH FUTURE WALL iNSULATiON, VAPOR RETARDER, MOiSTURE BARRiER & SiDiNG SUBFLOOR   vapor retarder on top of subfloor can be SEALED TO wALL vApOR RETARDER AT Bottom plate.   unfaced fiberglass-batt iNSULATiON FILLS JOIST OR GIRDER cAviTiES. SEE 61   p. T. MUDSILL FOUNDATION wALL   дЛ FLOOR INSULATION AT FOUNDATION /gN FLOOR […]

Open railings are connected to the floor of a porch or deck only intermittently, where the vertical supports occur. It is through these supports that open railings gain their rigidity. When the end of the railing is sup­ported at a wall or a column, no special connections are required. When the vertical support does not […]

Girder systems may be designed with either dimen­sion or laminated lumber. They are most common in the Northwest, where dimension timber is plentiful. Girder floor systems are similar to joist floor systems except that girders, which are wider than joists, can carry a greater load for a given span and therefore can be spaced at […]

Wood top and bottom chords are linked with steel tubing webs in the composite truss. The tubing is pressed flat at the ends and connected to the wood chords with a metal pin. Unlike wood trusses with metal plates (see 45A above), the webs of the com­posite truss are entirely free to rotate (on the […]