For Ontario building code part 9:
In tables 9.15.4.5.A. to 9.15.4.5.C. , there is "maximum Unsupported Basement Wall Height". In the meanwhile, there is this sentence: "9.15.4.2.(3) Foundation walls made of flat insulating concrete form units shall be laterally supported at the top and at the bottom". Further, as for lateral support at the bottom, 9.15.4.4. lists conditions accepted for flat insulating concrete form foundation walls being laterally supported at the bottom:
9.15.4.4. Foundation Walls Considered to be Laterally Supported at the Bottom
(1) Flat insulating concrete form foundation walls shall be considered to be laterally supported at the bottom where the foundation wall,
(a) supports backfill not more than 1.2 m in height,
(b) is supported at the footing by a shear key and is supported at the top by the ground floor framing, or
(c) is dowelled to the footing with not less than 15M bars spaced not more than 1.2 m o.c.
Questions:
1). Is the requirement of 9.15.4.2.(3) for the construction stage or for the completed condition of the foundation walls?
2). What is the use of tables 9.15.4.5.A. to 9.15.4.5.C.? For determining the backfill height before installation / completion of the lateral supports at the top and at the bottom required by 9.15.4.2.(3)?
3). What is the use of clause 9.15.4.4.? To be used for conditions to meet the requirement of 9.15.4.2.(3) for support at the bottom?
4). To satisfy 9.15.4.4. (c), minimum 15M bars shall be used, but there is no 15M bars in tables 9.15.4.5.A. to 9.15.4.5.C., therefore, assume a foundation wall is designed by using tables 9.15.4.5.A. to 9.15.4.5.C, the foundation wall would not satisfy 9.15.4.4. (c), then if backfill is more than 1.2 m in height (usually it is), only 9.15.4.4. (b) would be a condition to provide the support at the bottom of the completed condition of the foundation walls. Am I looking at these clauses in a wrong way?
In tables 9.15.4.5.A. to 9.15.4.5.C. , there is "maximum Unsupported Basement Wall Height". In the meanwhile, there is this sentence: "9.15.4.2.(3) Foundation walls made of flat insulating concrete form units shall be laterally supported at the top and at the bottom". Further, as for lateral support at the bottom, 9.15.4.4. lists conditions accepted for flat insulating concrete form foundation walls being laterally supported at the bottom:
9.15.4.4. Foundation Walls Considered to be Laterally Supported at the Bottom
(1) Flat insulating concrete form foundation walls shall be considered to be laterally supported at the bottom where the foundation wall,
(a) supports backfill not more than 1.2 m in height,
(b) is supported at the footing by a shear key and is supported at the top by the ground floor framing, or
(c) is dowelled to the footing with not less than 15M bars spaced not more than 1.2 m o.c.
Questions:
1). Is the requirement of 9.15.4.2.(3) for the construction stage or for the completed condition of the foundation walls?
2). What is the use of tables 9.15.4.5.A. to 9.15.4.5.C.? For determining the backfill height before installation / completion of the lateral supports at the top and at the bottom required by 9.15.4.2.(3)?
3). What is the use of clause 9.15.4.4.? To be used for conditions to meet the requirement of 9.15.4.2.(3) for support at the bottom?
4). To satisfy 9.15.4.4. (c), minimum 15M bars shall be used, but there is no 15M bars in tables 9.15.4.5.A. to 9.15.4.5.C., therefore, assume a foundation wall is designed by using tables 9.15.4.5.A. to 9.15.4.5.C, the foundation wall would not satisfy 9.15.4.4. (c), then if backfill is more than 1.2 m in height (usually it is), only 9.15.4.4. (b) would be a condition to provide the support at the bottom of the completed condition of the foundation walls. Am I looking at these clauses in a wrong way?