Top Head—The top head, regardless of shape, shall be able to support a single 250-lbf (113.4 kg) load on a 4 by 4-in. (100 by 100-mm) area without damage and with a maximum deflection of 1⁄2 % of the tank diameter at the area the load is applied.
Top Head—The top head, regardless of shape, shall beable to support a single 250-lbf (113.4 kg) load on a 4 by 4-in.(100 by 100-mm) area without damage and with a maximumdeflection of 1⁄2 % of the tank diameter at the area the load isapplied.