email keithrudd@iafrica.com
11 Pine Tree Park, Lekkerwater Road, Sunnydale, Cape Town SA
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Size
The joists are manufactured with a depth of 244mm and a flange width of 45mm and 70mm.
Capacity
Interim tests have shown that a 3mx3m suspended floor easily carries a load of 500Kg/m² with a joist deflection of only 5,72mm.
SuperJoist Engineered Joists
The joists are engineered to comply with SANS 1460 and the load span table has been devised to provide a firm and comfortable suspended floor structure with minimum deflection of the joists using the following criteria, which is also applicable to SANS 10082 and SANS 10063.
The joists are presently manufactured with a depth of 245mm and a flange width of 45mm and 70mm.
Iterim tests have shown that a 3mx3m suspended floor easily carries a load of 500kg/m2 with a joist deflection of only5.72mm
The joists are engineered to comply with SANS 1460 and the load span table has been devised to provide a firm and comfortable suspended floor structure with minimum deflection of the joists using the following criteria, which is also applicable to SANS 10082.
The 450mm joist spacing in the table is based on current conventional construction practice for 22mm thick strip floor coverings.
488mm spacing caters for boarded floors, where the board size is 2,440x1,220, in order to minimise board wastage.
Load span table
Live load: 1.5 kN/m2
Dead load 0,125 kN/m2
Point load: 1 500 N
Deflection criterion: 1/300th of span
Joist Dimensions |
SuperJoist Product Code |
Mass Per metre (Kg) |
Span Applications |
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Joist Depth (mm) |
Distance Between Flanges (mm) |
Flange Width (mm) |
Single Span |
Continuous Span |
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44 |
70 |
Joist Spacing (mm) |
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450 |
488 |
450 |
488 |
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Maximum Safe Span (m) |
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 SS44-244-9 |
 SS70-244-9 |
SS45-259-9 |
4,8 |
4,5 |
5,1 |
4,8 |
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245 |
172 |
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SS70-245-9 |
4,9 |
4,6 |
5,4 |
5,1 |
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245 |
172 |
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 SS70-244-11 |
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 SS70-245-11 |
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245 |
172 |
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 SS70-300-11 |
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| SS70-300-11 |
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300 |
228 |
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Application
A typical application where a 50mm concrete screed is laid onto the surface of an 18mm OSB subfloor over 44x244 SuperJoist floor framing where the joists have been laid at 488mm centres.
The concrete screed is finished off with a steel trowel and the finished surface may be tiled or carpeted as required.
This provides a tough, light weight and very solid suspended floor that is extremely durable and virtually soundproof.
