Hello, I'm new to this forum. I am almost complete building my pool. I am getting ready to pour the concrete patios (Decking) around the pool. One concrete guy said I should drill into the pool beam 2.5 inches max depth and do some stub outs of rebar to keep the surrounding concrete decking from raising or lower right next to the coping. Then I look at diagrams on the internet of proper pool construction and I can't see any information if its a "No No" or not. I'm thinking it probably is, but concerned that the concrete could slightly move over time leaving a problem edge. I know I need an expansion joint around the pool. But the contractor said he would still put the expansion joint.. just a hole though it for the rebar. Also if you notice in the picture I have a poured coping which is 3.5 inches and about 2 inches of exposure on the pool beam. SO not sure how to secure in or do I secure at all. Going to pour decking this weekend. Thank you in advance for any help!