Tempo:
The rough framing for basement windows, doors and other openings, as show in Figure 38, may be installed at the time the foundation wall formwork is erected. Measure and check the diagonals of the frames to ensure that the frames are square. The framing should be properly braced to keep the forms vertical and in place until the concrete has set.
Boxes that will form notches for the ends of floor beams would also be inserted into the foundation formwork prior to pouring the concrete (Figure 39). Treat wood beams abutting concrete below grade with preservative to prevent decay, or leave at least 12 mm (1⁄2 in.) of clearance at the sides and ends of the beam for air circulation.
38 Framing for a basement window
sill plate opening for window installation caulking preservative-treated wood blocking slope to exterior
39 Notches or beam pockets in foundation walls 12 mm (1⁄2 in.) clearance if beam is untreated and the beam bottom is at or below grade foundation wall notch or pocket for beam wood beam raised 38 mm (11⁄2 in.) to be level with sill plate
90 mm (31⁄2 in.) minimum bearing steel bearing plate separate wood beams installed less than 150 mm (6 in.) above grade from concrete with dampproofing material, such as 0.15 mm (6 mil) polyethylene.
Boxes that will form notches for the ends of floor beams would also be inserted into the foundation formwork prior to pouring the concrete (Figure 39). Treat wood beams abutting concrete below grade with preservative to prevent decay, or leave at least 12 mm (1⁄2 in.) of clearance at the sides and ends of the beam for air circulation.
38 Framing for a basement window
sill plate opening for window installation caulking preservative-treated wood blocking slope to exterior
39 Notches or beam pockets in foundation walls 12 mm (1⁄2 in.) clearance if beam is untreated and the beam bottom is at or below grade foundation wall notch or pocket for beam wood beam raised 38 mm (11⁄2 in.) to be level with sill plate
90 mm (31⁄2 in.) minimum bearing steel bearing plate separate wood beams installed less than 150 mm (6 in.) above grade from concrete with dampproofing material, such as 0.15 mm (6 mil) polyethylene.
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