Concrete Tank Steel Bands


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Steel Tank Bands - designed to give the concrete water tank its structural strength when the reinforcing reo has rusted through and failed. Stop Leaks early and reduce your steel reinforcement from rusting !


Steel bands are made from -


1. 50mm x 4 to 5mm thick Duragal Flat Steel Straps with tension joiners of a minium of two per perimeter, 3 tension joiners is even better equally spaced around the tank girth.


2. Welded to the end of the tension joins is 30mm x 30mm SHS at 2.5 mm thick x 100mm long - each strap end where tensioner is need this is welded into position as per the bottom photo.


3. We then have a gap of 100mm between the end of the flat steel bands where joins are - with a 20mm high tensile all thread bolt at 500mm long with double nut and large washer each end to tension up the joins of straps.


Not really hard to make at all al you need to work out is th emeasure the perimter of the tank accurately work how many 6 meter lengths of steel straps you will need to get around that length take off 100mm for each join you will need then cut straps to length and weld on the 30mm SHS x 100mm long box section steel welded onto staps to accommodate the allthread bolts.


Eg. 23.5 meters perimeter measurement = 23,500 mm perimeter measurement divided by steel lengths of 6000mm = 3.91 ( so 4 lengths of 6.0 meter long steel will be required. )


i) So you know you will 4 lengths of strap to get around that measurement

ii) You will need to take off 400mm for the join gaps in the steel where allthread tensioners are to be positioned.

iii) 23,500 mm - 400mm = 23,100mm length divided by 4 = 5,775mm for the flat strap lengths ( you can get these cut to length by the steel supplier.)

iv) Weld onto each end the 30mm x 30mm SHS x 100mm long box section steel for tensioners.

v) then with all thread and nuts and bolts for the straps to the tank.


Remember to tension up the straps as much as you can and then retension on a hot day as the steel will heat up and stretch slighlty in hot weather.



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