_a._ The stress on bolts or studs in connection with steam cylinders
must not exceed 7,500 lbs. per square inch under a test pressure of 80
lbs. steam, disregarding such initial strain as may be due to setting
up. (Compute pressure area out to center line of bolts.)
No stud or bolt smaller than 3/4 inch should be used to assemble parts
subject to the strain of steam pressure as smaller bolts are likely to
be twisted off.