I need to support 2 x 127x76x13 UB (bolted @ 600 ctrs) across an opening of 2.6m in a 28cm (11") cavity wall. The designer's 'program' suggests 250x250 padstones, but I can't locate anything that size. Do the padstones need to be in one piece on each side (distributing the load across the inner and outer skin of the wall), or would 2 x 300x140x102mm butted together on each side be OK?
Padstones to Support RSJ
- Thread starter CHarr
- Start date
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Just put one 215 long x140 high x100wide pad on each skin.
Cast your own, we do.
We had always relied on precast ones, but not that long ago started casting our own, much more preferable.
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We still buy the proprietary block size pads i.e. 440mm x 215mm x 100mm fellas, but always cast the unusual sized lumps ourselves.
We use heavy dense blocks and some polythene and make moulds, usually in the internal corner of the extension.
It's the ones that need to bridge a cavity wall that are the most likely candidates for a self-moulded pad.
I don't have time (the steels arrive today). My main concern is whether I need single stones, spanning the cavity, or whether two standard sizes, such as 215x140x102mm are an acceptable alternative. There are two beams, and both the span and the loads are modest.
The steels can still be fitted and the pads retrospectively installed by means of acro propping etc.
We often do it this way.
We often do it this way.
You could cast them this morning using rapid set. And the. Install the steels later leaving them propped so that the pads don't take the weight until Monday.
Time shouldn't be an issue.
Time shouldn't be an issue.
Just use the two separate padstones!
Given the cost of getting the padstones off the shelf, I wouldn't entertain casting my own. I'll leave that to people who are working on someone else's time and with someone else's money.
That's fine as long as you can find the size you need.
We only cast the stones we can not buy off the shelf.
Otherwise it is a time consuming faff getting stones made to measure. I certainly wouldn't entertain spending the customers money chasing and fetching for a couple of specials.
A 900mm 140x100 concrete lintel, cut in half, bed one pad' on each skin. Job done.
If you can get them delivered that's fine. Nice and easy; but often on a building site there are concrete materials and OSB lying around and a couple of tiny pads like that would take no time to form and pour. The simple answer is do the easiest thing for you either is acceptable.
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