(a) The membrane and the membrane supporting insulation must be made of materials that withstand the combined strains calculated under Sec. 154.429(c).
(b) Analyzed data of a material test for the membrane and the membrane supporting insulation must be submitted to the Commandant (CG-ENG). [CGD 74-289, 44 FR 26009, May 3, 1979, as amended by CGD 82-063b, 48 FR 4782, Feb. 3, 1983]