which website can i get free information to download on cost estimating practices?

Question

i am working on a survey of cost estimating practices of construction contractors at tender stage.so i need any related journals,theses,papers and other related information sources.

Answer 1

Prehaps this will help a bit, this is a Concrete Calculator with costs:
http://www.infoforbuilding.com/Download%20material/ConcreteEST.xls
If the link gets broken, here it is in 2 steps, you add the http://www.
infoforbuilding.com/Download (Combine with)
%20material/ConcreteEST.xls