What is the minimum pocket depth required for rebated coloumns
The minimum washer size is 3 mm. This could be different. If nothing is mentioned use 3 mm.
The minimum bolt stick out should be 1 pitch. For M20 it is 2.5 mm. Use 10 mm stick out.
Also there is grout. Pockets when cast could be of different depths. Use design grout of 15 mm minimum.
The top of the bolt should be 35 mm below slab level to prevent concrete Cracking.
Hence to be practical use 100 mm pocket depth with a base plate thickness of 16 mm and bolt size of 20 mm.
