Show dolglas lilt RE co N the west coast association so announces that the under writers yli laboratories of chicago 1 maintained by tile he national hoard board of fire underwriters has recently made tests test ot of the ore fire resistant resia resi stent tent properties of douglas fir nt at the request of fre ere door manufacturers As a result ot of this test tile the ull underwriters der writers laboratories liale liae recommended that douglas fir lie be listed as standard for the making of oe cores in tin clad fire doors As a result of 0 this test by tile the ln in aurance interests it is antic anticipated that it a new field of in market arlit e exploitation will be opened to lir fir manufacturers |