Side
af
764
Forrige
Næste
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OF ENGINEERING fobmulæ.
Strength and Weight of Materials—continued.
..................Stones, &c.
Specific Gravity. Weight of a cubic foot. Weight of a cubic inch. Tensile ' Strength per sq. in. Crushing Strain per sq. in. 1 Transverse | Strength.
lbs. lbs. Ibs. lbs. 1b«.
Basalt, Scotch 2-95 184 •106 1,469 8,300 ——
„ Greenstone .. .. 2-9 181 •104 17,200 ■—-
„ Welsh 2-75 172 •099 16,800
Chalk 2'33 145 •084 —- 501
Firestone ... 2-62 162 •094 —— —
1-8 112 •065 —
Granite, Aberdeen grey .. 2-62 163 •094 — 10,900 ——
„ „ red .. 2-62 165 •095 —-
„ Cornish .. .. 2-66 166 •096 —-. 6,300
„ Mount Sorrel .. 2-67 167 •096 ■1 » ■ 12,800 —
Limestone, Compact .. 2-58 161 •093 —— 1,100
„ Purbeck .. .. 2-6 162 •093 — 9,160 4"*«»
„ Anglesea ,. —. —• — 7,579 ——
„ Bina Lias ,. 2-467 154 •089 «— —•
„ Lithographic.. Marble, Statuary .. .. 2-6 162 •093 —■ — —
2'718 170 •098 722 3,216 —■
„ Italian 2-726 170 •098 —. 9,681 —
„ Brabant block .. 2'697 168 •097 —— 9,219
„ Devonshire .. .. Oolite, Portland stone .. — — — — 7,428
2-423 151 ■087 —— 4,100
„ Bath stone .. .. 1-978 123 •072 - - —
Sandstone, Arbroath pave-) ment .. .. 5 2-477 155 •089 1,261 7,884 4-
„ Brainley-Kall .. 2-5 156 •09 6,(150 —
„ Caithness .. .. 2-638 165 •095 1,054 6,490 857
„ Craglieth .. .. 2-45 153 •088 453 5,287
„ Derby grit .. 2-4 150 •086 — 3,100 ——
„ Red (Cheshire) 2-15 133 •077 2,185^
„ Y orkshire paving Slate, Anglesea 2-51 157 •09 — 5,714 —
2-8? 1T9 •103 ) 9,600 10,000
„ Cornwall 2-51 157 •09 > to to
„ Welsh 2-88 180 •104 512,800 21,000:196]'
Trap 2-72 170 •098 - — 1
c 2