All resonable care has been taken in compiling the information in this document. All recommendations & suggestions on the use of Durham products are made without guarantee, since the conditions of use are beyond the control of the company. It is the customer's responsibility to ensure that each product is fit for its intended purpose & that the actual conditions of use are suitable. Engineering advice may be necessary. All detailed dimensions are a guide only & mary vary in the manufacturing process. Product details & dimensions are a guide only & not to be used for installation purposes.