KR>Fiberglass question

[Alexander Birca (RMD)]

                Hi All,
        the question is, what is the thickness and tensile strength of 
fiberglass which is used for lay-up process. 
May I use one type (thickness or density?) of fiberglass or it should be 
different one in different area?  
Where I can read more detailed info about used fiberglass in KR construction.


        Thanks,
        Alex Birca