I am building a detached garage with an office over. The inner leaf is dense concrete block with outer skin in hand made soft reds to match the main house. My structural engineer has specified padstones beneath steel beam to be block size 450x215x100 and concrete mix GEN 3. Can I cast these in situ and what mix is GEN 3?
Casting a concrete padstone in situ
- Thread starter Neubauer
- Start date
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GEN3 is an ST2 or C20 mix and can be cast insitu. 
Bah!, knew you were going to ask...
1:3:6 - Cement:Sand:20mm aggregate. 50-75mm slump
1:3:6 - Cement:Sand:20mm aggregate. 50-75mm slump
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Yep its about the workability of the mix, not too sloppy-not to dry
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