. A treatise on architecture & building construction volume VII: tables and formulas . 00 lb. per sq. , capstone, in lime mortar 350 lb. per sq. in. Bluestone (a sandstone) 500 to 700 lb. per sq. in. Limestone, capstone, in lime mortar 500 lb. per sq. , square stone masonry, in lime mortar 350 lb. per sq. in. Sandstone, square stone masonry, in lime .mortar . 175 lb. per sq. in. Limestone, square stone masonry, in lime mortar 250 lb. per sq. in. Rubble masonry, in lime mortar. . 80 lb. per sq. masonry, in Portland cement mortar 150 lb. per sq. in. Concrete, Port
. A treatise on architecture & building construction volume VII: tables and formulas . 00 lb. per sq. , capstone, in lime mortar 350 lb. per sq. in. Bluestone (a sandstone) 500 to 700 lb. per sq. in. Limestone, capstone, in lime mortar 500 lb. per sq. , square stone masonry, in lime mortar 350 lb. per sq. in. Sandstone, square stone masonry, in lime .mortar . 175 lb. per sq. in. Limestone, square stone masonry, in lime mortar 250 lb. per sq. in. Rubble masonry, in lime mortar. . 80 lb. per sq. masonry, in Portland cement mortar 150 lb. per sq. in. Concrete, Portland cement (1 of cement, 2 of sand, 5 of broken stone) 150 lb. per sq. in. SOIL. Rock foundation 20 tons per sq. ft. Gravel and sand (compact) 6 to 10 tons per sq. ft. Gravel and sand (mixed with dry clay) 4 t° 6 tons Per S<1* ft* Stiff clay, blue clay tons per sq. ft. Chicago clay 1 to tons per sq. ft. In the values given for masonry, the height of the wallshould not be over 16 times the thickness. § 5 TABLES AND FORMULAS. 7 STANDARD FRAMING FOR I BEAM TABLES AND FORMULAS. §5 O d a g a o o s .s o ^ 5=1 two S-1 o * *5 . d 5 £ - £ fl 03 o 2 +J ° *d .0 o ^ 03 ?d d d CI * 2 ° s o r . a s -° +j *? ^ •d 7^ oj 0 ^ s 9 ?a« 60 72 «d § g I -9a s -° S £ ^ o s ^ B|l 0> d .d a* rd .. a> * 0 I •4_J rU • r-j ^ ^ o ^ ^ 1 02 co d d 2 5o o S £ -32 ^£ S £ ?in t-H 0 G *^ d cl> rd rn 8 S a; to O «*d o o Ja g O o T T It O §§ 5, 6 TABLES AND FORMULAS. 9 SQUARE OF THE LEAST RADIUS OF GYRATIONFOR THE DIFFERENT SECTIONS OFCAST-IRON COLUMNS. SolidSquare. R = w SolidRectangle. R* = w SolidCircular. 16 HollowSquare. k i 1 v 12 HollowCircular. If 16 FACTORS OF SAFETY FOR COLUMNS. Fixed Hinged Fixed Hinged Fix ed Hinged and and / and and / and and Flat Round K Flat Round R Flat Round Ends. Ends. Ends. Ends. Ends. Ends, 20 3 2 3-3° 110 4 1 4 65 200 5< 0 3° 3 3 3-45 1 20 4 2 4 80 210 5 I 40 3 4 130 4 3 4 95 220 5- 2 50 3 5 3-
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