. Increasing efficiency and decreasing cost in school house construction with keystone gypsum blocks. s isalso simplified, and greater safety insured by the use of 22 PARTITIONS KEYSTONE BLOCKS. This can be accomplish-ed in either one of two ways. The toughness of theblocks enables them to hold nails or screws; but if thismethod is followed, where heavy blackboards are to becarried, courses of solid KEYSTONE BLOCKSshould be built in where the top and bottom lines offastening will occur, so as to avoid the possibility ofthe nails or screws finding the cores or air spaces in theblock. Or, as it
. Increasing efficiency and decreasing cost in school house construction with keystone gypsum blocks. s isalso simplified, and greater safety insured by the use of 22 PARTITIONS KEYSTONE BLOCKS. This can be accomplish-ed in either one of two ways. The toughness of theblocks enables them to hold nails or screws; but if thismethod is followed, where heavy blackboards are to becarried, courses of solid KEYSTONE BLOCKSshould be built in where the top and bottom lines offastening will occur, so as to avoid the possibility ofthe nails or screws finding the cores or air spaces in theblock. Or, as it is possible to cut or drill throughKEYSTONE BLOCKS the same as wood, withoutdanger of cracking or splintering, T-Anchor-bolts canbe used, the T head taking the pull on the reverse sideof the partition. The latter is generally considered themost practical method, as it eliminates the additionalcost of the solid blocks and makes it unnecessary toestablish the exact height or position of blackboards,until they are hung. 7^ u rr H w • C HI 2. JO n o > r n 2 o 5cro 3C/2 n troo X o cr o FT n> 3. 24 PARTITIONS Lightness CHE feature of lightness is desirable in a fire-proofbuilding, where the saving in dead load often per-mits the use of a lighter beam than would otherwise berequired, or the reduction of the total section of metalin concrete reinforcement; and it is a necessity if fire-proof partitions are to be used on wood floor con-struction. KEYSTONE GYPSUM BLOCKS are thelightest^ first-class fire-proofing material on the following is a table of standard sizes and weights: Weight per sq. ft. i^ inch hollow-back (furring). 41^ pounds 2 inch hollow-back (furring). 5 pounds 2 inch solid 8 pounds 3 inch solid (roof blocks) ... 13 pounds 3 inch hollow 8j4 pounds 4. inch hollow 10 pounds 5 inch hollow 13 pounds 6 inch hollow 15 pounds 8 inch hollow . . . .18 pounds PARTITIONS 25 Econo??iy ^TT^HILE the care and supervision given to the\\) manufacture of KEYSTONE BLOCKS
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Keywords: ., book, bookcentury1900, bookdecade1910, booksubjectschoolbuildings
