[Code of Federal Regulations]
[Title 46, Volume 7]
[Revised as of October 1, 2004]
From the U.S. Government Printing Office via GPO Access
[CITE: 46CFR189.35-9]

[Page 351-352]
 
                           TITLE 46--SHIPPING
 
   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)
 
PART 189_INSPECTION AND CERTIFICATION--Table of Contents
 
                   Subpart 189.35_Weight Handling Gear
 
Sec. 189.35-9  Plans.

    (a) Plans will not normally be required, however depending on the 
use of the weight handling gear, submission of plans or other technical 
information may be required by the Officer in Charge, Marine Inspection. 
Unless an unsafe condition is in evidence, vessel operations will not be 
delayed while plans or other technical information are under review. 
Plans, when required, shall normally include:
    (1) One line electrical diagrams showing appropriate overload 
protection as currently required by subchapter J (Electrical 
Engineering) of this chapter.
    (2) Plans showing hydraulic or pneumatic equipment.
    (3) Stress and/or arrangement diagrams with supporting design 
calculations as appropriate to the specific equipment in question.

[[Page 352]]

    (b) When weight handling gear is built to a recognized code or 
specification, plans or other technical data will not normally be 
required. Purchase specification or vendor's information may be accepted 
in lieu of design calculations if sufficiently definitive of materials, 
design (safety) factors and operating limitations.
    (c) Design information, when required, will be evaluated against the 
following minimum design criteria:
    (1) Wet Weight Handling Gear: Wet gear shall be considered to 
consist of gear used to lower equipment, apparatus or objects beneath 
the surface of the water or for trailing objects, where the wire rope or 
cable is payed out beneath the surface and becomes part of the line pull 
at the head sheave or winch drum. Wet gear shall be designed, as a 
minimum, to withstand and operate in excess of the breaking strength of 
the strongest section or wire to be used in any condition of loading. 
The safety factor for all metal structural parts shall be a minimum of 
1.5; i.e., the yield strength of the material shall be at least 1.5 
times the calculated stresses resulting from application of a load equal 
to the nominal breaking strength of the strongest section or wire rope 
to be used. Suitable assumptions for the actual loading conditions shall 
be used in the design of wet gear. The lead of the wire rope from the 
head sheave or winch drum shall be considered to vary from the vertical 
and in azimuth in a manner to represent the most adverse loading 
condition.
    (2) Other weight handling gear will be evaluated on the basis of the 
standards of a recognized organization or association recognized by the 
Commandant under Sec. 31.10-6.
    (3) Hydraulic or pneumatic systems will be evaluated on the basis of 
Subchapter F (Marine Engineering) of this chapter.

[CGFR 67-83, 33 FR 1118, Jan. 27, 1968, as amended by CGFR 69-116, 35 FR 
6863, Apr. 30, 1970; CGD 95-028, 62 FR 51219, Sept. 30, 1997]