45 



of outlasting other types of sub-structure support with the exception 

 of mass concrete construction. It is necessarily limited by high cost 

 to structures in which long economic life, fire risk or difficulty of re- 

 placement justifies increased expense. 



Form of Service Record Reports to the Committee 



For the purpose of service record reports desired by this Commit- 

 tee the following revised form will be used in the future. It will be 

 mimeographed so that it can be sent out by the Committee for execution 

 and return. The form has been restricted in the data requested to 

 what has seemed the lowest possible limits, in view of the constantly 

 increasing range of information which continued study of service rec- 

 ord problems raises. Information on a few points may not be avail- 

 able for structures of many years' standing; but it is hoped that co- 

 operators can keep substantially such data in future records, in view 

 of the very great value which ten years' keeping of such information 

 throughout the Bay region will have. In filling out the form it is 

 hoped that on certain items, such as concrete manufacture, creosote 

 treatment, etc., detailed information will be furnished when it is avail- 

 able, as indicated in the footnote of the form, using separate sheets 

 wherever necessary, properly referenced to the form. In respect to 

 concrete manufacture, for example, it is often necessary, for a com- 

 petent judgment of results, to know what kind of sand and aggregate 

 were used, whether the aggregate was graded, what the mixing practice 

 was (as bearing upon thoroughness of mixing and wetness of mix), etc. 



SERVICE RECORD REPORT 



To the S. F. Bay Marine Piling Committee 



I. Statistical Data: 



a. Owner : Name 



Address: Street City Calif. 



b. Person in charge: 



Name 



Address: Street City Calif. 



Phone 



c. Location 



d- Name of structure 



II. Construction Data: 



a. Type of structure 



b. General dimensions: L x B Can you supply a 



plan? 



c. Distance of deck above high tide 



d. Average depth of water Can you supply profiles? 



