[Code of Federal Regulations]
[Title 46, Volume 4]
[Revised as of October 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 46CFR134.140]

[Page 487]
 
                           TITLE 46--SHIPPING
 
    CHAPTER I--COAST GUARD, DEPARTMENT OF TRANSPORTATION (CONTINUED)
 
PART 134--ADDED PROVISIONS FOR LIFTBOATS--Table of Contents
 
Sec. 134.140  Structural standards.

    (a) Except as provided by paragraph (b) of this section, each 
liftboat must comply with the ABS's ``Rules for Building and Classing 
Mobile Offshore Drilling Units'', assuming a steady wind speed of 100 
knots for liftboats in unrestricted service, and 70 knots for liftboats 
in restricted service under normal operating conditions and 100 knots 
under severe storm conditions, as follows:
    (1) The main hull structure, legs, and supporting structure must 
comply with Section 3/4.3 of the Rules.
    (2) The calculations required by Section 3/4.3 of the Rules must 
assume the vessel to be in the most adverse loading conditions described 
by Sections 3/2.1 and 3/4.1 of the Rules.
    (3) Unless otherwise agreed upon by the Commandant (G-MSE), the 
calculations on column-buckling required by Section 3/4.3 of the Rules, 
must employ an effective-length factor, ``K'', of not less than 2.0.
    (4) The calculations on single-rack jacking systems required by 
Sections 3/2.1 and 3/4.1 of the Rules must include an extra bending 
moment caused by the most adverse eccentric loading of the legs.
    (b) Standards of classification societies other than the ABS, and 
other established standards acceptable to the Commandant (G-MSE), may be 
used.
    (c) Upon submittal of the plans required by Secs. 127.110 and 
133.130 of this subchapter, the standard used in the design must be 
specified.
    (d) If no established standard is used in the design, etailed design 
calculations must be submitted with the plans required by Secs. 127.110 
and 133.130 of this subchapter.