Hello Frieind, Weicome to Knowledge Civil Engineering My Name is Joydeep Debnath, and (https://civilengineeringjoydeep.blogspot.com) this is my blog. I have written everything about civil engineering. I create this blog so that any student can be taaken back for study but there are many studens who can't take notes for money can't take Private tution So I have given everything in thud blog PDF file. and I Have create this blog so that a new student can know everything about civil engineering. so that no has any problem.