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Vertical and horizontal steel reinforcement for 150-mm-thick below-grade walls^{Footnote (2)} supporting brick-veneer
Wall Height (m)	Backfill Height (m)	Maximum Spacing for Vertical Reinforcement (mm)						Maximum Spacing for Horizontal Reinforcement (mm)
		Seismic Zone Classification
		Sa(0.2)=0.10	Sa(0.2)=0.20	Sa(0.2)=0.35	Sa(0.2)=0.65	Sa(0.2)=1.00	Sa(0.2)=1.25	All locations
2.44	1.22	10M@333	10M@333	10M@333	10M@333	10M@333	10M@333	15M@410
	1.53	10M@333	10M@333	10M@333	10M@333	10M@333	10M@333	15M@410
	1.83	10M@333	10M@333	10M@333	10M@333	10M@200	10M@250	15M@410
	2.14	10M@333	10M@333	10M@333	10M@300	10M@250	15M@400	15M@410
3.05	1.22	10M@333	10M@333	10M@333	10M@333	10M@333	10M@333	15M@410
	1.53	10M@333	10M@333	10M@333	10M@333	10M@333	10M@333	15M@410
	1.83	10M@333	10M@333	10M@333	10M@333	10M@250	10M@250	15M@410
	2.14	10M@300	10M@300	10M@300	10M@250	15M@400	15M@400	15M@410
	2.44	10M@250	10M@250	10M@250	15M@400	15M@300	15M@300	15M@410
	2.75	15M@4000	15M@400	15M@400	15M@300	15M@250	15M@250	15M@410

Vertical and horizontal steel reinforcement for 150-mm-thick below-grade walls^{Footnote (2)} supporting brick-veneer (cont.)
Wall Height (m)	Backfill Height (m)	Maximum Spacing for Vertical Reinforcement (mm)						Maximum Spacing for Horizontal Reinforcement (mm)
		Seismic Zone Classification
		Sa(0.2)=0.10	Sa(0.2)=0.20	Sa(0.2)=0.35	Sa(0.2)=0.65	Sa(0.2)=1.00	Sa(0.2)=1.25	All locations
3.66	1.22	10M@333	10M@333	10M@333	10M@333	10M@333	10M@333	15M@410
	1.53	10M@333	10M@333	10M@333	10M@333	10M@333	10M@300	15M@410
	1.83	10M@333	10M@333	10M@333	10M@300	10M@250	15M@400	15M@410
	2.14	10M@250	10M@250	10M@250	15M@400	15M@300	15M@300	15M@410
	2.44	15M@4000	15M@400	15M@400	15M@300	15M@250	15M@200	15M@410
	2.75	15M@300	15M@300	15M@300	15M@250	15M@200	15M@150	15M@410
	3.05	15M@250	15M@250	15M@250	15M@200	15M@150	15M@100	15M@410
	3.36	15M@200	15M@200	15M@200	15M@150	15M@100	15M@100	15M@410

Vertical and horizontal steel reinforcement for 150-mm-thick below-grade walls^{Footnote (2)} not supporting brick-veneer
Wall Height (m)	Backfill Height (m)	Maximum Spacing for Vertical Reinforcement (mm)						Maximum Spacing for Horizontal Reinforcement (mm)
		Seismic Zone Classification
		Sa(0.2)=0.10	Sa(0.2)=0.20	Sa(0.2)=0.35	Sa(0.2)=0.65	Sa(0.2)=1.00	Sa(0.2)=1.25	All locations
2.44	1.22	10M@400	10M@400	10M@400	10M@400	10M@400	10M@400	15M@410
	1.53	10M@400	10M@400	10M@400	10M@400	10M@400	10M@300	15M@410
	1.83	10M@400	10M@400	10M@400	10M@300	10M@250	10M@200	15M@410
	2.14	10M@300	10M@300	10M@300	10M@250	10M@200	15M@300	15M@410
3.05	1.22	10M@400	10M@400	10M@400	10M@400	10M@400	10M@400	15M@410
	1.53	10M@400	10M@400	10M@400	10M@400	10M@300	10M@250	15M@410
	1.83	10M@400	10M@400	10M@300	10M@250	10M@200	15M@300	15M@410
	2.14	10M@250	10M@250	10M@250	10M@200	15M@300	15M@250	15M@410
	2.44	10M@200	10M@200	10M@200	15M@300	15M@200	15M@150	15M@410
	2.75	15M@300	15M@300	15M@300	15M@200	15M@150	15M@150	15M@410
3.66	1.22	10M@400	10M@400	10M@400	10M@400	10M@400	10M@400	15M@410
	1.53	10M@400	10M@400	10M@400	10M@400	10M@300	10M@250	15M@410
	1.83	10M@300	10M@300	10M@300	10M@250	15M@300	15M@300	15M@410
	2.14	10M@250	10M@250	10M@200	15M@300	15M@250	15M@200	15M@410
	2.44	15M@300	15M@300	15M@300	15M@200	15M@150	15M@150	15M@410
	2.75	15M@250	15M@250	15M@250	15M@150	15M@100	15M@100	15M@410
	3.05	15M@200	15M@200	15M@150	15M@100	15M@100	NA 1	15M@410
	3.36	15M@150	15M@150	15M@100	15M@100	NA	NA	15M@410

Vertical and horizontal steel reinforcement for 200-mm-thick below-grade walls^{Footnote (2)} supporting brick-veneer
Wall Height (m)	Backfill Height (m)	Maximum Spacing for Vertical Reinforcement (mm)						Maximum Spacing for Horizontal Reinforcement (mm)
		Seismic Zone Classification
		Sa(0.2)=0.10	Sa(0.2)=0.20	Sa(0.2)=0.35	Sa(0.2)=0.65	Sa(0.2)=1.00	Sa(0.2)=1.25	All locations
2.44	1.22	10M@333	10M@333	10M@333	10M@333	10M@333	10M@333	15M@410
	1.53	10M@333	10M@333	10M@333	10M@333	10M@333	10M@333	15M@410
	1.83	10M@333	10M@333	10M@333	10M@333	10M@300	10M@250	15M@410
	2.14	10M@333	10M@333	10M@333	10M@300	10M@250	15M@400	15M@410
3.05	1.22	10M@333	10M@333	10M@333	10M@333	10M@333	10M@333	15M@410
	1.53	10M@333	10M@333	10M@333	10M@333	10M@333	10M@333	15M@410
	1.83	10M@333	10M@333	10M@333	10M@333	10M@250	15M@400	15M@410
	2.14	10M@333	10M@333	10M@300	10M@250	15M@400	15M@300	15M@410
	2.44	10M@250	10M@250	10M@250	15M@400	15M@300	15M@250	15M@410
	2.75	15M@400	15M@400	15M@400	15M@300	15M@250	15M@200	15M@410
3.66	1.22	10M@333	10M@333	10M@333	10M@333	10M@333	10M@333	15M@410
	1.53	10M@333	10M@333	10M@333	10M@333	10M@333	10M@300	15M@410
	1.83	10M@333	10M@333	10M@333	10M@300	10M@250	15M@400	15M@410
	2.14	10M@250	10M@250	10M@250	15M@400	15M@300	15M@300	15M@410
	2.44	15M@400	15M@400	15M@400	15M@300	15M@250	15M@200	15M@410
	2.75	15M@300	15M@300	15M@300	15M@250	15M@200	15M@150	15M@410
	3.05	15M@250	15M@250	15M@250	15M@200	15M@150	15M@100	15M@410
	3.36	15M@200	15M@200	15M@200	15M@150	15M@100	15M@100	15M@410

Vertical and horizontal steel reinforcement for 200-mm-thick below-grade walls^{Footnote (2)} not supporting brick-veneer
Wall Height (m)	Backfill Height (m)	Maximum Spacing for Vertical Reinforcement (mm)						Maximum Spacing for Horizontal Reinforcement (mm)
		Seismic Zone Classification
		Sa(0.2)=0.10	Sa(0.2)=0.20	Sa(0.2)=0.35	Sa(0.2)=0.65	Sa(0.2)=1.00	Sa(0.2)=1.25	All locations
2.44	1.22	10M@333	10M@333	10M@333	10M@333	10M@333	10M@333	15M@410
	1.53	10M@333	10M@333	10M@333	10M@333	10M@333	10M@333	15M@410
	1.83	10M@333	10M@333	10M@333	10M@333	10M@333	10M@300	15M@410
	2.14	10M@333	10M@333	10M@333	10M@333	10M@300	10M@250	15M@410
3.05	1.22	10M@333	10M@333	10M@333	10M@333	10M@333	10M@333	15M@410
	1.53	10M@333	10M@333	10M@333	10M@333	10M@333	10M@333	15M@410
	1.83	10M@333	10M@333	10M@333	10M@333	10M@333	10M@250	15M@410
	2.14	10M@333	10M@333	10M@333	10M@300	15M@400	15M@400	15M@410
	2.44	10M@300	10M@300	10M@300	15M@400	15M@300	15M@300	15M@410
	2.75	10M@250	10M@250	15M@400	15M@300	15M@250	15M@250	15M@410
3.66	1.22	10M@333	10M@333	10M@333	10M@333	10M@333	10M@333	15M@410
	1.53	10M@333	10M@333	10M@333	10M@333	10M@333	10M@333	15M@410
	1.83	10M@333	10M@333	10M@333	10M@333	10M@250	15M@400	15M@410
	2.14	10M@333	10M@333	15M@333	10M@250	15M@400	15M@300	15M@410
	2.44	10M@250	10M@250	10M@250	15M@300	15M@250	15M@250	15M@410
	2.75	15M@400	15M@400	15M@300	15M@300	15M@200	15M@150	15M@410
	3.05	15M@300	15M@300	15M@300	15M@200	15M@150	15M@150	15M@410
	3.36	15M@250	15M@250	15M@250	15M@200	15M@150	15M@100	15M@410

Notes:

Footnote 1

NA refers to the fact that the combination of height and backfill exceeds the maximum capacity of the wall; engineering input is required.

Return to footnote 1 referrer

Footnote 2

Tables 4.3.1.1(A) to (D) are based on the following assumptions:

The design is applicable for the seismic zones indicated in the tables.
The design is applicable to structures that are to be constructed on soil Type E or better.
Maximum building length = 18.0 m.
Maximum building width = 12.0 m.
Maximum floor clear span = 6.0 m.
Maximum roof clear span = 12.0 m.
Maximum number of storeys above grade is two (2).
Maximum number of storeys below grade is one (1).
Maximum height of foundation walls and first-floor walls is 3.66 m.
Maximum height of above-grade second-floor wall is 3.66 m.
The concrete walls are evenly distributed on each side and in each direction.
K0= 0.47; density of soil = 18 kN/m³.
Roof dead load = 0.50 kPa.
Floor dead load = 0.70 kPa.
Snow load = 1.84 kPa.
Floor live load = 1.90 kPa.
Surcharge lateral pressure = 2.4 kPa.
All walls are proportionally and evenly distributed in both the transverse and longitudinal directions of the building.
Below-grade walls are considered to be supported by the floor system at the top.
Reinforcing bars conform to CSA G30.18, Grade 400. Specified yield strength of reinforcement, fy, is 400 MPa.
Wall design detailing bends, placement, spacing, splicing and protection of reinforcement are in accordance with CSA A23.3-09.
For below-grade walls, vertical reinforcement is located on the inside face of the wall, between horizontal bars. The concrete cover to the vertical reinforcement (measured from the edge of concrete to centre of reinforcement bars) is 30 mm.
Horizontal reinforcing conforms to the tables, plus a 1-10M continuous bar is placed 150 mm from the top of the wall and at floor level.
Two full-height vertical bars that are equal to the vertical reinforcing within the wall system are installed at all corners and on each side of the wall openings.
Two 15M bars are placed around all openings and extend 600 mm (24") beyond each side of the openings.
Minimum 28-day concrete compressive strength is 20 MPa. Maximum aggregate size is 13 mm for the 150-mm-thick concrete walls and 19 mm for 200-mm- and 250-mm-thick concrete walls.
Concrete is allowed to cure for a minimum of seven days prior to backfilling.
All materials and workmanship conform to the requirements of the NBC 2015 and any revisions and errata that have been released as of the issue date of these tables.

Return to footnote 2 referrer

Vertical and Horizontal Steel Reinforcement for Above-grade Walls^{Footnote (1)}
	Wall Height (m)	Max. Spacing for Vertical Reinforcement (mm)		Max. Spacing for Horizontal Reinforcement (mm)
		150-mm wall	200-mm wall	150-mm wall	200-mm wall
		Hourly Wind Pressure, q1/50 ≤ 0.58 kPa Sa(0.2) ≤ 0.94
Single-storey concrete construction supporting a wood-frame roof structure	2.44	10M@400	10M@333	10M@325	15M@410
	3.05	10M@400	10M@333	10M@325	15M@410
	3.66	10M@400	10M@333	10M@325	15M@410

Vertical and Horizontal Steel Reinforcement for Above-grade Walls^{Footnote (1)} (cont.)
	Wall Height (m)	Max. Spacing for Vertical Reinforcement (mm)		Max. Spacing for Horizontal Reinforcement (mm)
		150-mm wall	200-mm wall	150-mm wall	200-mm wall
		Hourly Wind Pressure, q1/50 ≤ 0.58 kPa Sa(0.2) ≤ 0.94
Ground floor concrete construction supporting a second- storey wood-frame and wood-frame roof structure	2.44	10M@400	10M@333	10M@325	15M@410
	3.05	10M@400	10M@333	10M@325	15M@410
	3.66	10M@400	10M@333	10M@325	15M@410
Ground floor concrete construction supporting a second- storey concrete construction and a wood-frame roof structure	2.44	10M@400	10M@333	10M@325	15M@410
	3.05	10M@400	10M@333	10M@325	15M@410
	3.66	10M@400	10M@333	10M@325	15M@410

Note:

Footnote 1

Table 4.3.1.2 is based on the following assumptions:

The design is applicable for the seismic zones and the maximum factored wind pressure indicated in the tables.
Loads include all applicable gravity, seismic and wind loads.
The exterior walls are designed to include the option of cladding with bricks.
For allowable building dimensions, see Note (1) to Tables 4.3.1.1(A) to (D).
For assumed loads, see Note (1) to Tables 4.3.1.1(A) to (D).
Vertical reinforcement is placed in the centre of the wall.
For concrete and steel materials properties, see Note (1) to Tables 4.3.1.1(A) to (D).
Horizontal reinforcing conforms to the tables, plus 1-10M continuous bar is placed 150 mm from the top of wall and at floor level.
Two full-height vertical bars that are equal to the vertical reinforcing within the wall system are installed at all corners and on each side of the wall openings.
Two 15M bars are placed around all openings and extend 600 mm (24") beyond each side of the openings.
All materials and workmanship conform to the requirements of the NBC 2015 and any revisions and errata that have been released as of the issue date of these tables.

Return to footnote 1 referrer

Required lengths of solid walls (no openings) at all corners for seismic loading – 150 mm thick
Sa(0.2)		0.4		0.6		0.8		1.0		1.2
Building
Length	Width	G-2	2-R	G-2	2-R	G-2	2-R	G-2	2-R	G-2	2-R
6	6	1.22	1.20	1.40	1.20	1.55	1.20	1.64	1.20	1.97	1.20
9	6	1.55	1.20	1.77	1.20	1.96	1.20	2.08	1.20	2.49	1.26
9	9	1.90	1.20	2.17	1.20	2.40	1.22	2.54	1.29	3.05	1.55
12	6	1.88	1.20	2.15	1.20	2.37	1.20	2.52	1.28	3.02	1.53
12	12	2.62	1.34	2.99	1.53	3.30	1.69	3.51	1.79	4.21	2.15
15	6	2.21	1.20	2.52	1.28	2.78	1.41	2.95	1.50	3.55	1.80
15	12	2.99	1.53	3.41	1.74	3.77	1.93	4.00	2.04	4.80	2.45
15	15	3.38	1.73	3.86	1.98	4.26	2.18	4.52	2.32	5.43	2.78
18	6	2.53	1.29	2.90	1.47	3.20	1.62	3.39	1.72	4.07	2.07
18	12	3.36	1.72	3.84	1.96	4.24	2.17	4.50	2.30	5.40	2.76
18	18	4.18	2.15	4.78	2.46	5.28	2.71	5.60	2.88	6.72	3.45
24	6	3.19	1.62	3.64	1.85	4.02	2.04	4.27	2.17	5.12	2.60
24	12	4.10	2.10	4.68	2.40	5.17	2.65	5.49	2.81	6.58	3.38
24	18	5.00	2.58	5.72	2.95	6.32	3.26	6.70	3.46	8.04	4.15
24	24	5.91	3.06	6.76	3.50	7.46	3.86	7.92	4.10	9.50	4.92

Required lengths of solid walls (no openings) at all corners for seismic loading – 200 mm thick
Sa(0.2)		0.4		0.6		0.8		1.0		1.2
Building
Length	Width	G-2	2-R	G-2	2-R	G-2	2-R	G-2	2-R	G-2	2-R
6	6	1.20	1.20	1.27	1.20	1.40	1.20	1.48	1.20	1.78	1.20
9	6	1.40	1.20	1.60	1.20	1.77	1.20	1.88	1.20	2.25	1.20
9	9	1.71	1.20	1.95	1.20	2.16	1.20	2.29	1.20	2.75	1.39
12	6	1.69	1.20	1.94	1.20	2.14	1.20	2.27	1.20	2.72	1.38
12	12	2.34	1.20	2.68	1.36	2.96	1.50	3.14	1.60	3.77	1.91
15	6	1.99	1.20	2.27	1.20	2.51	1.27	2.66	1.35	3.19	1.62
15	12	2.67	1.36	3.05	1.55	3.37	1.71	3.57	1.82	4.29	2.18
15	15	3.01	1.54	3.44	1.75	3.80	1.94	4.03	2.06	4.84	2.47
18	6	2.28	1.20	2.61	1.32	2.88	1.46	3.05	1.55	3.66	1.86
18	12	2.99	1.53	3.42	1.74	3.78	1.93	4.01	2.04	4.81	2.45
18	18	3.71	1.90	4.24	2.17	4.68	2.39	4.96	2.54	5.96	3.05
24	6	2.87	1.45	3.28	1.66	3.62	1.83	3.84	1.95	4.61	2.33
24	12	3.64	1.86	4.16	2.13	4.60	2.35	4.88	2.49	5.85	2.99
24	18	4.42	2.27	5.05	2.59	5.58	2.86	5.92	3.04	7.10	3.65
24	24	5.19	2.68	5.94	3.06	6.56	3.38	6.96	3.58	8.35	4.30

Required lengths of solid walls (no openings) at all corners for seismic loading – 250 mm thick
Sa(0.2)		0.4		0.6		0.8		1.0		1.2
Building
Length	Width	G-2	2-R	G-2	2-R	G-2	2-R	G-2	2-R	G-2	2-R
6	6	1.20	1.20	1.20	1.20	1.31	1.20	1.39	1.20	1.67	1.20
9	6	1.31	1.20	1.50	1.20	1.65	1.20	1.76	1.20	2.11	1.20
9	9	1.60	1.20	1.82	1.20	2.01	1.20	2.14	1.20	2.56	1.30
12	6	1.58	1.20	1.81	1.20	2.00	1.20	2.12	1.20	2.54	1.28
12	12	2.18	1.20	2.49	1.26	2.75	1.39	2.92	1.48	3.50	1.78
15	6	1.86	1.20	2.12	1.20	2.34	1.20	2.49	1.26	2.98	1.51
15	12	2.48	1.26	2.83	1.44	3.13	1.59	3.32	1.68	3.98	2.02
15	15	2.79	1.42	3.18	1.62	3.52	1.79	3.73	1.90	4.48	2028
18	6	2.13	1.20	2.43	1.23	2.69	1.36	2.85	1.44	3.42	1.73
18	12	2.77	1.41	3.17	1.61	3.50	1.78	3.72	1.89	4.46	2.27
18	18	3.42	1.75	3.91	2.00	4.32	2.20	4.58	2.34	5.5	2.81
24	6	2.67	1.35	3.05	1.55	3.37	1.71	3.58	1.81	4.30	2.17
24	12	3.37	1.72	3.85	1.96	4.25	2.17	4.51	2.30	5.42	2.76
24	18	4.07	2.08	4.65	2.38	5.13	2.63	5.45	2.79	6.54	3.34
24	24	4.76	2.44	5.44	2.79	6.01	3.09	6.38	3.27	7.66	3.93

Minimum Steel Reinforcement of Lintels^{Footnote (2)}
150-mm Core	Factored Uniformly Distributed Load
150-mm Core	10 kN/m				20 kN/m
Opening Width (mm)	Lintel Depth (mm)	Bottom Steel	Stirrups	Stirrup End Distance (mm)	Lintel Depth (mm)	Bottom Steel	Stirrups	Stirrup End Distance (mm)
2500	300	1-15M	No stirrups	0	300	1-15M	No stirrups	0
3000	300	1-15M	No stirrups	0	300	2-15M	10M@150	260
3500	300	1-15M	No stirrups	0	300	2-15M	10M@150	510
4000	300	2-15M	No stirrups	0	300	2-20M	10M@150	760
4500	300	2-15M	No stirrups	0	450	2-15M	10M@250	530
5000	300	2-15M	No stirrups	0	450	2-20M	10M@250	780
5500	300	2-20M	10M@150	270	600	2-20M	10M@350	640
6000	450	2-15M	No stirrups	0	600	2-20M	10M@350	890

Minimum Steel Reinforcement of Lintels^{Footnote (2)}
150-mm Core	Factored Uniformly Distributed Load
150-mm Core	30 kN/m				40 kN/m
Opening Width (mm)	Lintel Depth (mm)	Bottom Steel	Stirrups	Stirrup End Distance (mm)	Lintel Depth (mm)	Bottom Steel	Stirrups	Stirrup End Distance (mm)
1500	300	1-15M	No stirrups	0	300	1-15M	No stirrups	0
2000	300	1-15M	No stirrups	0	300	2-15M	10M@150	380
2500	300	2-15M	10M@150	420	300	2-15M	10M@150	630
3000	300	2-20M	10M@150	670	450	2-15M	10M@250	640
3500	450	2-15M	10M@250	600	450	2-20M	10M@250	890
4000	450	2-20M	10M@250	850	600	2-20M	10M@350	950
4500	600	2-20M	10M@350	850	600	2-20M	10M@350	1200
5000	600	2-20M	10M@350	110	NA^{Footnote (1)}	NA	NA	NA
5500	NA	NA	NA	NA	NA	NA	NA	NA

Minimum Steel Reinforcement of Lintels^{Footnote (2)}
150-mm Core	Factored Uniformly Distributed Load
150-mm Core	50 kN/m
Opening Width (mm)	Lintel Depth (mm)	Bottom Steel	Stirrups	Stirrup End Distance (mm)
1000	300	1-15M	No stirrups	0
1500	300	1-15M	10M@150	250
2000	300	2-15M	10M@150	500
2500	300	2-20M	10M@150	750
3000	450	2-20M	10M@250	810
3500	600	2-20M	10M@350	910
4000	600	2-20M	10M@300	1160
4500	NA^{Footnote (1)}	NA	NA	NA

Minimum Steel Reinforcement of Lintels^{Footnote (2)}
200-mm Core	Factored Uniformly Distributed Load
200-mm Core	10 kN/m				20 kN/m
Opening Width (mm)	Lintel Depth (mm)	Bottom Steel	Stirrups	Stirrup End Distance (mm)	Lintel Depth (mm)	Bottom Steel	Stirrups	Stirrup End Distance (mm)
2500	300	1-15M	No stirrups	0	300	1-15M	No stirrups	0
3000	300	1-15M	No stirrups	0	300	2-15M	10M@150	260
3500	300	1-15M	No stirrups	0	300	2-15M	10M@150	510
4000	300	2-15M	No stirrups	0	300	2-20M	10M@150	760
4500	300	2-15M	No stirrups	0	450	2-15M	10M@250	530
5000	300	2-15M	No stirrups	0	450	2-20M	10M@250	780
5500	300	2-20M	10M@150	270	600	2-20M	10M@350	640
6000	450	2-15M	No stirrups	0	600	2-20M	10M@350	890

Minimum Steel Reinforcement of Lintels^{Footnote (2)}
200-mm Core	Factored Uniformly Distributed Load
200-mm Core	30 kN/m				40 kN/m
Opening Width (mm)	Lintel Depth (mm)	Bottom Steel	Stirrups	Stirrup End Distance (mm)	Lintel Depth (mm)	Bottom Steel	Stirrups	Stirrup End Distance (mm)
1500	300	1-15M	No stirrups	0	300	1-15M	No stirrups	0
2000	300	1-15M	No stirrups	0	300	2-15M	10M@150	380
2500	300	2-15M	10M@150	420	300	2-15M	10M@150	630
3000	300	2-20M	10M@150	670	450	2-15M	10M@250	640
3500	450	2-15M	10M@250	600	450	2-20M	10M@250	890
4000	450	2-20M	10M@250	850	600	2-20M	10M@350	950
4500	600	2-20M	10M@350	850	600	2-20M	10M@350	1200
5000	600	2-20M	10M@350	110	NA^{Footnote (1)}	NA	NA	NA
5500	NA	NA	NA	NA	NA	NA	NA	NA

Table 4.3.1.4(F) Minimum Steel Reinforcement of Lintels^{Footnote (2)}
200-mm Core	Factored Uniformly Distributed Load
200-mm Core	50 kN/m
Opening Width (mm)	Lintel Depth (mm)	Bottom Steel	Stirrups	Stirrup End Distance (mm)
1000	300	1-15M	No stirrups	0
1500	300	1-15M	10M@150	250
2000	300	2-15M	10M@150	500
2500	300	2-20M	10M@150	750
3000	450	2-20M	10M@250	810
3500	600	2-20M	10M@350	910
4000	600	2-20M	10M@300	1160
4500	NA	NA	NA	NA

Notes:

Footnote 1

NA indicates that the load is not feasible; engineering input is required.

Return to footnote 1 referrer

Footnote 2

Tables 4.3.1.3(A) to (F) are based on the following assumptions:

The design of the lintels is limited to factored uniformly distributed gravity loads, which do not include lateral loads, or point loads such as concentrated loads, created by girder, trusses, columns, and beams.
The minimum height of the lintel is 300 mm.
The top of all lintels is laterally supported by the building's roof and floor system.
Stirrups are single-leg fabricated from 10M bars installed at the specified spacing.
Lintel reinforcement is located 25 mm from the bottom of lintel and projects 600 mm into the lintel support on each side.
Specified compressive strength of concrete, @ 28 days f'c, is 20 MPa.
Specified yield strength of reinforcement, fy , is 400 MPa.
Two 15M bars are placed around all openings and extend at least 600 mm beyond each corner of the opening.

Return to footnote 2 referrer

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