'Forewarned is fore-armed' say some. Others 'do your due diligence'. Bottom line - do some background research. Here's mine. (With as many internet links links in as I can to help you with yours) If you can pick a hole I what I write, or see that I've missed something, I'd be so grateful if you could tell me. Method We already know that we have to pile. Does the SI report give a hint at which type of pile? Have a look at this Phase 2 SI Report: Concrete Design page 12, point 7.4: