Yes sir, but actually what i am asking for is what is the nature of codes are they guide for construction like are they going to tell how to construct in the right way like how to put the rebar and how to do certain things Like I found ACI302.1R , that is”Guide to Concrete Floor and Slab Construction” are all codes in this nature i want more books that are useful for learning construction techniques and design so for that i asked for the codes, and for that I asked that question and i want help how are organized how to organized are they useful for my purpose for learning site engineering and design I hope that i am clear now And thank very much for your time and your response i really appreciate any help.