La. Admin. Code tit. 43 § XIII-6967

Current through Register Vol. 50, No. 11, November 20, 2024

Section XIII-6967 - Wind Forces [49 CFR 193.2067]

A. LNG facilities must be designed to withstand without loss of structural or functional integrity:

1. the direct effect of wind forces; [ 49 CFR 193.2067(a)(1) ]

2. the pressure differential between the interior and exterior of a confining, or partially confining, structure; and [ 49 CFR 193.2067(a)(2) ]

3. in the case of impounding systems for LNG storage tanks, impact forces and potential penetrations by wind borne missiles. [ 49 CFR 193.2067(a)(3) ]

B. The wind forces at the location of the specific facility must be based on one of the following:

1. for shop fabricated containers of LNG or other hazardous fluids with a capacity of not more than 70,000 gallons, applicable wind load data in ASCE/SEI 7 (incorporated by reference, see §6713). [ 49 CFR 193.2067(b)(1) ]

2. for all other LNG facilities:

a. an assumed sustained wind velocity of not less than 150 miles per hour, unless the Commissioner finds a lower velocity is justified by adequate supportive data; or [ 49 CFR 193.2067(b)(2)(i) ]

b. the most critical combination of wind velocity and duration, with respect to the effect on the structure, having a probability of exceedance in a 50-year period of 0.5 percent or less, if adequate wind data are available and the probabilistic methodology is reliable. [ 49 CFR 193.2067(b)(2)(ii) ]

La. Admin. Code tit. 43, § XIII-6967

Promulgated by the Department of Natural Resources, Office of Conservation, LR 441050 (6/1/2018).

AUTHORITY NOTE: Promulgated in accordance with R.S. 30:551.C.