It has this drawback, that it must cut the size of lumber for which it is set; that is, the sawyer has no choice in cutting the thickness, but it is very economical, wasting only one-eighth of the log in sawdust.

A special form is the flooring gang.

It consists of a number of saws placed one inch apart.

Thick planks are run thru it to saw up flooring.
[Illustration: Fig.33.

Gang-Saw.] [Illustration: Fig.34.