Small animals tend to live shorter lives than larger animals. There are a few theories as to why that is, but the one I believe is most popular is: small animals tend to live shorter lives anyway (because of threats from predators), so there are fewer opportunities to evolve to be long-lived.
The American National Standards Institute (ANSI) Class 150 is a system of dimensional standards for weld neck, threaded, slip-on, lap joint, socket weld and blind flanges. Dimensions for facing, bolts and studs are also included in ANSI Class 150. ANSI Class 150 establishes measures for pipe sizes.
ClarkDietrich Cold-Formed Steel C-Studs. (NEW) ClarkDietrich iTools - Structural Stud Lookup Tool. ClarkDietrich studs are made in a variety of flange widths to meet different applications. 1  Standard Web Size: 2-1/2â, 3-1/2â, 3-5/8â, 4â, 5-1/2â, 6â, 8â, 10â, 12â, 14â.  Flange Sizes: 1-3/8â, 1-5/8â, 2â, 2-1/2â, 3â.