Tempo:
If the underside of the joists of decks or other accessible exterior platforms is located more than 600 mm (24 in.) above the ground, the foundation must be below frost level so that movement does not cause drainage to be directed into the house.
installed behind the siding and lapped over the header joist or ledger (Figure 176). Alternatively, use other means such as wood blocking for special-purpose deck hangers for the ledger to provide a drainage space between the decking and the siding.
If the joists are more than 600 mm (24 in.) above the ground or support a superstructure such as a canopy, the piers must be braced.
Foundations for decks and other accessible exterior platforms need not be below the frost level if the deck or platform is not more than one storey, is 55 m2 (590 sq. ft.) or less in area does not support a roof, and its movement will not affect the structure to which it is attached.
Special attention is required when decks are bolted to the building envelope. The surface of the deck should be located at least 19 mm (3⁄4 in.) below the floor level of the building and should slope a minimum of one per cent away from the building to remove rain and snowmelt. Decks attached directly to the sides of buildings with siding should have flashing
Where these conditions are met and a shallow foundation is constructed, there must be means for levelling the structure. Access must be provided by either a passageway below at least 600 mm (24 in.) high or with removable decking.
176 Deck connection to house sheathing air space between vertical strapping exterior cladding lap building paper over flashing continue flashing over first deck board 3 mm (1⁄8 in.) gap between deck boards deck sloped 1% or 10 mm (1⁄8 in.) per metre (foot) deck joist spacer washers and caulking joist hanger treated wood ledger bolts or lag screws
installed behind the siding and lapped over the header joist or ledger (Figure 176). Alternatively, use other means such as wood blocking for special-purpose deck hangers for the ledger to provide a drainage space between the decking and the siding.
If the joists are more than 600 mm (24 in.) above the ground or support a superstructure such as a canopy, the piers must be braced.
Foundations for decks and other accessible exterior platforms need not be below the frost level if the deck or platform is not more than one storey, is 55 m2 (590 sq. ft.) or less in area does not support a roof, and its movement will not affect the structure to which it is attached.
Special attention is required when decks are bolted to the building envelope. The surface of the deck should be located at least 19 mm (3⁄4 in.) below the floor level of the building and should slope a minimum of one per cent away from the building to remove rain and snowmelt. Decks attached directly to the sides of buildings with siding should have flashing
Where these conditions are met and a shallow foundation is constructed, there must be means for levelling the structure. Access must be provided by either a passageway below at least 600 mm (24 in.) high or with removable decking.
176 Deck connection to house sheathing air space between vertical strapping exterior cladding lap building paper over flashing continue flashing over first deck board 3 mm (1⁄8 in.) gap between deck boards deck sloped 1% or 10 mm (1⁄8 in.) per metre (foot) deck joist spacer washers and caulking joist hanger treated wood ledger bolts or lag screws
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