Wind forces.

(a)LNG facilities must be designed to withstand without loss of structural or functional integrity:#

(1)The direct effect of wind forces;#

(2)The pressure differential between the interior and exterior of a confining, or partially confining, structure; and#

(3)In the case of impounding systems for LNG storage tanks, impact forces and potential penetrations by wind borne missiles.#

(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 § 193.2013).#

(2)For all other LNG facilities:#

(i)An assumed sustained wind velocity of not less than 150 miles per hour, unless the Administrator finds a lower velocity is justified by adequate supportive data; or#

(ii)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.#