We manufacture a concrete lintel system of the highest quality. The pre-stressed concrete lintels are textured to accept all kinds of applied finish and are easily handled. The system provides an economic and convenient form of construction, having many advantages over comparable lintel systems with its ease of installation.
COMPOSITE LINTELS
These lintels utilise the composite action of the concrete and brick/blockwork together to provide their load-bearing capacities as shown in the table below.
A strong mortar mix of 3 parts sand to 1 part cement is recommended with brick reinforcing fully interleaving each course. Three courses of brickwork are equivalent to two courses of blockwork. As the brickwork mortar matures, lintels of over 1200mm spans should be propped at 1200mm centres. Bearings at each end must be at least 150mm and for lintels of over 3 metres, longer bearings are recommended. A damp proof course, when used, must be strong and plastic enough to avoid cracking and be placed so as not to break the lintel/blockwork bond. Ideally the d.p.c. should not be included in the composite wall joist at all, but if essential then it should be only tucked in 30mm.
NON-COMPOSITE LINTELS
Where a higher load bearing capacity is required, or there is insufficient brickwork above to allow adequate composite action, non-composite lintels are the solution.
No propping is necessary during construction and also wall plates, trusses and floor joists can be accommodated as directly imposed load in accordance with the table overleaf. Bearings at each end must be at least 150mm and for lintels of over 3 metres, longer bearings are recommended.
COMPOSITE
lintel maximum uniformity distributed load for clear spans
kg/m
Section
wxh mm
No
of
courses
0.60
m
0.75
m
0.90
m
1.05
m
1.20
m
1.35
m
1.50
m
1.65
m
1.80
m
1.95
m
2.10
m
2.25
m
2.40
m
2.55
m
2.70
m
2.85
m
100
x 65
2
2033
1407
1029
785
617
497
408
340
288
246
212
185
162
143
127
113
5
2743
1900
1392
1062
836
674
554
463
392
336
291
254
223
197
175
156
8
4166
2889
2118
1618
1275
1030
849
711
603
516
449
393
347
308
274
246
The
self-weight of the lintel has been allowed for in the
calculations
Section
w x h (mm)
100
x 65
Weight/linear
metre (kg)
15.5
The table above is for safe
working, uniformly distributed loads applied to the composite
construction in kg/metre run of span exclusive of self
weight of brickwork within the construction, but including
the weight of the lintel. The design is based on the brickwork
having a limiting crushing strength of 10.4 N/mm2.
NON-COMPOSITE
lintel maximum uniformity distributed load for clear
spans kg/m
Section
wxh mm
0.75
m
0.90
m
1.05
m
1.20
m
1.35
m
1.50
m
1.65
m
1.80
m
1.95
m
2.10
m
2.25
m
2.40
m
2.55
m
2.70
m
2.85
m
3.00
m
3.15
m
3.30
m
3.75
m
4.05
m
150
x 100
2381
1739
1282
1006
808
662
551
464
395
340
295
257
226
199
176
157
140
125
-
-
100
x 150
3590
2628
1880
1480
1191
976
816
691
638
511
458
390
344
302
272
244
219
198
-
-
140
x 150
-
-
3564
2806
2263
1862
1557
1319
1131
979
855
751
665
592
529
476
429
389
-
-
100
x 215
-
-
-
-
2952
2694
2413
2140
1882
1624
1402
1202
1122
1004
856
812
723
664
517
423
The
self-weight of the lintel has been allowed for in the
calculations
Section
w x h (mm)
100
x 150
140
x 150
100
x 215
Weight/linear
metre (kg)
36
50
52
The table above is for safe
working, uniformly distributed loads applied to the non-composite
lintels in kg/metre run of span inclusive of the weight
of the lintel.
All products are available
ex works.
Prices on application.
Telephone our sales office for further information and
quotations.
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