Illinois Society of Architects · Chicago · leaf 488
shall be considered common lumber. 13. Two general classes shall be recog-nized. The first shall be suitable for use asa whole for purposes in which surface cov-ering or strength is required. Defects andblemishes permitted in this class must besound. The second class permits verycoarse defects… … H [oL. 5 i^._ ■IH8 l\)lal products of atypical log ar-ranged in series,according to qual-ity as determinedby appearance. Basic Grade Classification for Yard Lumber. SLiitable for na- ( (Irade A—Practically free from defects. tural finishes. ] Grade B—Allows a few small defects or blemishes.[ Grade…
Architecture · Building · Architects
Internet Archive · University of Illinois Urbana-Champaign · Public Domain Mark 1.0. Free to use for anything.
