Rough wood framing for window: Frame around window must support downward forces above window from floor/roof joists or roof trusses above. In addition, there must be a small gap above the window itself so that any deflection of the framing under load will not bear on window and bind or break it. The joists/trusses above will bear on the double top plate, which is supported by a doubled wood header/lintel, here 2 2"x10" boards set on edge side by side and supported directly on one of the two studs on each side of the window. The window will be supported at its bottom by the sill, which is supported by short cripple studs below it. The frame is sheathed on the outside with wood oriented strand board, OSB, which is then covered with Tyvek wall wrap, as can be seen through the window hole. Ann Arbor, Michigan, October, 2006.
woodframestick builtexteriorwallresidenceplatechip boardstudtrussjoistAnn ArborMichigannailnailedlintelheadersillcripple studwindowTyvekwall wraporiented strandboardOSBwindow framingdeflectionwarpcarpentryrough carpentry9916
From Wood Construction: frame, stick-built, frame, temporary support, floor, wall, truss, sheath, roof