Notice: This site currently shows the 2012/2017 edition of the Ontario Building Code. The current legally effective code is the 2024 edition (O.Reg. 163/24), in effect since January 1, 2025. Confirm current requirements at ontario.ca.

The Ontario Building Code | Reinforcement for Flat Insulating Concrete Form Foundation Walls

9.15.4.5. Reinforcement for Flat insulating Concrete Form foundation Walls

(1) Horizontal reinforcement in flat insulating concrete form foundation walls shall,

(a) consist of,

(i) one 10M bar placed not more than 300 mm from the top of the wall, and

(ii) 10M bars spaced not more than 600 mm o.c., and

(b) be located,

(i) in the inside half of the wall section, and

(ii) with a minimum cover of 30 mm from the inside face of the concrete.

(2) Vertical wall reinforcement in flat insulating concrete form foundationwalls shall,

(a) conform to,

(i) Table 9.15.4.5.A. for 140 mm walls,

(ii) Table 9.15.4.5.B. for 190 mm walls, and

(iii) Table 9.15.4.5.C. for 240 mm walls,

(b) be located in the inside half of the wall section with a minimum cover of 30 mm from the inside face of the concrete wall, and

(c) where interrupted by wall openings="http://thehandyforce.com/windows/" title ="Window installer in Toronto">openings, be placed not more than 600 mm from each side of the openings="http://thehandyforce.com/windows/" title ="Window installer in Toronto">openings.

(3) Cold joints in flat insulating concrete form foundation walls shall be reinforced with at least one 15M bar spaced not more than 600 mm o.c. and embedded not less than 300 mm on both sides of the joint.

(4) Reinforcing around openings="http://thehandyforce.com/windows/" title ="Window installer in Toronto">openings in flat insulating concrete form foundationwalls shall comply with Article 9.20.17.3. or 9.20.17.4.

Table 9.15.4.5.A.
Vertical Reinforcement for 140 mm Flat insulating Concrete Form foundation Walls

Forming Part of Sentence 9.15.4.5.(2)

Item

Column 1

Column 2

Column 3

Column 4

Maximum Height of Finished Ground Above Finished basement floor, m

Minimum Vertical Reinforcement

Maximum Unsupported basement wall Height

2.44 m

2.75 m

3.00 m

1.

1.35

10M at 400 mm o.c.

10M at 400 mm o.c.

10M at 400 mm o.c.

2.

1.60

10M at 400 mm o.c.

10M at 380 mm o.c.

10M at 380 mm o.c.

3.

2.00

10M at 380 mm o.c.

10M at 380 mm o.c.

10M at 380 mm o.c.

4.

2.20

10M at 250 mm o.c.

10M at 250 mm o.c.

10M at 250 mm o.c.

5.

2.35

n/a

10M at 250 mm o.c.

10M at 250 mm o.c.

6.

2.60

n/a

10M at 250 mm o.c.

10M at 250 mm o.c.

7.

3.00

n/a

n/a

10M at 250 mm o.c.

Table 9.15.4.5.B.
Vertical Reinforcement for 190 mm Flat insulating Concrete Form foundation Walls

Forming Part of Sentence 9.15.4.5.(2)

Item

Column 1

Column 2

Column 3

Column 4

Maximum Height of Finished Ground Above Finished basement floor, m

Minimum Vertical Reinforcement

Maximum Unsupported basement wall Height

2.44 m

2.75 m

3.00 m

1.

2.20

none required

10M at 400 mm o.c.

10M at 400 mm o.c.

2.

2.35

n/a

10M at 300 mm o.c.

10M at 300 mm o.c.

3.

2.60

n/a

10M at 300 mm o.c.

15M at 400 mm o.c.

4.

3.00

n/a

n/a

15M at 400 mm o.c.

Table 9.15.4.5.C.
Vertical Reinforcement for 240 mm Flat insulating Concrete Form foundation Walls

Forming Part of Sentence 9.15.4.5.(2)

Item

Column 1

Column 2

Column 3

Column 4

Maximum Height of Finished Ground Above Finished basement floor, m

Minimum Vertical Reinforcement

Maximum Unsupported basement wall Height

2.44 m

2.75 m

3.00 m

1.

2.20

none required

none required

none required

2.

2.60

n/a

15M at 400 mm o.c.

15M at 400 mm o.c.

3.

3.00

n/a

n/a

15M at 400 mm o.c.

In Plain Language

Flat insulating concrete form (ICF) foundation walls need reinforcement meeting the requirements set out in this article, since the concrete core still needs steel reinforcing bar despite the insulated forms surrounding it.

This is a plain-language summary of the 2012/2017 Ontario Building Code text above, for general understanding only and not a substitute for the Code. Always confirm current requirements against the 2024 edition (O.Reg. 163/24) or a qualified professional before construction.