Accession Number : AD0284310

Title :   REMOVAL OF SAND FROM DRYDOCKS

Descriptive Note : Final rept.

Corporate Author : NAVAL CIVIL ENGINEERING LAB PORT HUENEME CA

Personal Author(s) : DOMAN, J.J. ; DITTUS, C.A.

Report Date : 20 AUG 1962

Pagination or Media Count : 33

Abstract : Sand left by sandblasting operations on graving dock floors is sucked into dewatering pumps and causes damage to valuable machinery. This survey was made to determine the most effective and economical method for removing sand prior to dewatering. Low-profile equipment can remove spent sand from unobstructed dock floors. In areas with unrestricted ceiling a scoop loader can remove the accumulated sand for placement into containers. A low-profile tractor is adequate for movement of sand in open spaces of the dock. But when a vessel is mounted on blocks, the working area and height near the blocks prevents the use of large-size and high-profile equipment. The maximum elevation above the dock floor of either the operator's head or the equipment should be approximately 48 in. Spent sand must be removed manually from dock floors where plinths, adjustable chain-operated bilge blocks, steps or altar sides, numerous drains, and other obstructions preclude the use of mechanical equipment. (Author)

Descriptors :   *DRYDOCK EQUIPMENT, *SAND, *SHIPYARDS, ABRASIVE BLASTING, ABRASIVES, CLEANING.

Distribution Statement : APPROVED FOR PUBLIC RELEASE