Document n9d7yXp6DR4bmq7gMxRExr92G

July 10, 1961* Mr* R. L. Donahue Sr. Project Bnglneer Fire Protection Dept. Underwriters' Laboratories, Ino. P.0. Box 2h7 Northbrook, Illinois j i / Dear Kr. Donahue J j Sneloaed are twenty (20) oopiea of the d!rawin& with specifications and application instruction sheet pertaining to our class A shingle. / At this time, no decision has been mad^ as to a name for this product, so consequently there is no name designation on the drawings* j We felt it was more important to get this material to you as soon as possible, rather than withhold it until the product name was available. In the meantime, we shall have to designate it as "Bird Class A Shingle." Sincerely yours, BUILDING MATERIALS DIVISION CEH/nt Caryl B. Hinds Product Development Chemist DRAWN BY TRACED BY CHECKED (2. UlNOS PAT. CDS. INDEXED SCALE JZ ~ DATE BIRD * SON. iac. EAST WALPOLE. MASS. ENGINEEMNG DIVISION MILL. BUILDING MACHINE-------------------SECTION OP MACHINE. NAME OF PART___ E* >Z / Q fk ASSCM, MAT LltT. Area per Square? 214.0,003 3q, ft, net Shingles per Square: 81 Exposure t Met Wt. per Square: 3^0 lbs,, min, Wt. of Exposed Tab per 100 sq, ft,: 125> lb3,# min, Wt, of Surfacing Katerlal: Min* 3^ of Total vt. Pelt Weight (3,D.): 11.0 lbs. per 100 sq. ft. Stabilizer in Coating: min. hT** including fiber Entire shingle is double coated and double surfaced, 3 to 5 cold embossed vertical lines, each approximately 6V* long and approximately V32" wide, located at random in exposed portion of 3hingle and extending from lower edge,. 11 to 13 dashes of adhesive per shingle. Dashes are approximately IV long and are on approximately 3* centers. Dashes are located within a 2n band above embossed vertical lines. Anti-Stick medium is to be located on the back of the shingle in a band of sufficient width to inhibit sticking in the bundles. BIRD 015577 BIRD 015578 68 BIRD 015575