What is the purpose of Navfac P 307?
NAVFAC P-307 provides the minimum training and competency requirements for personnel involved in the maintenance, inspection, testing, certification, repair, alteration, operation/rigging of weight handling equipment (WHE) owned by the Navy.
What markings are required on lashing?
Lashing Lashing must be marked to identify it to the spool or reel from which it came. The rated load must be marked on each piece as well as the re- inspection due date.
What is the actual test load or test load tolerance?
the actual test load, or test load tolerance, is plus 0 minus 5 (+0/-5) percent of the nominal test load for rigging gear ( not including cranes, cranes structures, hoists, winches, portable floor cranes, and portable gantry/A-frames).
What types of power does a Category 1 or 4 Crane generally use?
Learning Objectives Upon successful completion of this module you will be able to define and identify critical crane components, load bearing parts, load controlling parts, and operational safety devices. Power Types Category 1 and 4 cranes generally use electric or hydraulic power that is supplied by a diesel engine.
What category is a pillar jib crane?
Category 2 and 3 Cranes Category 2 and Category 3 cranes include: Overhead traveling cranes; Gantry cranes; Wall cranes; Jib cranes; Davits; Pillar cranes; Pillar jib cranes; Monorails and associated hoists; Fixed overhead hoists, including fixed manual and powered hoists; Portable A-frames and portable gantries with …
What must be stamped on each hoist?
Rated load marking. The rated load of the crane shall be plainly marked on each side of the crane, and if the crane has more than one hoisting unit, each hoist shall have its rated load marked on it or its load block and this marking shall be clearly legible from the ground or floor. Clearance from obstruction.
What is the maximum allowable stretch for hoisting chains?
(c) Check each chain link for excessive wear, twisted or bent links, cuts, nicks, or gouges, and stretched links. If wear exceeds 15 percent of the original diameter of the link, the chain should be removed from service. A 5 percent stretch on any link should be considered the maximum allowable.
What is difference between load and stress testing?
The key difference is the goal of each: Load tests help you understand how a system behaves under an expected load. Stress tests help you understand the upper limits of a system’s capacity using a load beyond the expected maximum.
What is difference between load and performance testing?
Performance testing is the process of determining the system’s performance that includes speed, reliability under varying load . Load testing is the process of determination of behavior of system when multiple users access it at the same time.
What is the anti two block?
Anti two-block or ATB systems help prevent the ball block from contacting the boom tip. This is called two-blocking and can cause injury or death as well as damage to the crane, load line and ball or block. The ATB switch connects to the crane’s LMAP system through a wire or battery-powered transmitter.