Handbook of Railroad Construction; For the use of American engineers. / Containing the necessary rules, tables, and formulæ for the location, construction, equipment, and management of railroads, as built in the United States.

by George L. Vose

374. Table 9. Showing the necessary amount of grate area and heating surface for an hourly consumption of water.

Cubic ft. of water evap’d per hour.	GRATE AREAS IN SQUARE FEET.
	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30
	HEATING SURFACE CORRESPONDING TO ABOVE GRATE AREAS AND TO SIDE COLUMN.
100	561	599	636	670	703	734	764	793	821	848	874	900	924	948	972	995	1017	1039	1060	1081	1102	1122	1142	1161
110	588	628	667	702	737	770	802	831	861	888	916	943	969	994	1018	1042	1066	1089	1111	1133	1155	1176	1197	1217
120	614	657	697	734	770	805	837	869	900	927	957	985	1013	1039	1064	1089	1114	1138	1162	1184	1207	1229	1251	1272
130	639	683	725	764	801	837	871	904	936	965	996	1025	1053	1081	1107	1133	1159	1184	1208	1232	1255	1278	1300	1323
140	663	709	752	793	831	869	904	938	972	1003	1034	1064	1093	1122	1150	1177	1203	1229	1254	1279	1303	1327	1351	1374
150	686	734	779	821	860	900	935	971	1006	1038	1070	1101	1131	1161	1190	1218	1245	1272	1298	1323	1350	1373	1398	1422
160		758	805	848	889	927	966	1004	1039	1073	1106	1138	1169	1199	1229	1258	1286	1314	1341	1367	1393	1419	1444	1469
170		782	829	874	916	957	996	1034	1071	1106	1140	1173	1205	1236	1266	1296	1325	1354	1382	1409	1436	1462	1488	1514
180		805	853	900	943	985	1025	1064	1102	1138	1173	1207	1240	1272	1303	1334	1364	1393	1422	1450	1478	1505	1532	1558
190			877	924	969	1013	1053	1093	1132	1169	1205	1240	1274	1307	1339	1370	1401	1431	1461	1490	1518	1546	1573	1600
200			900	948	995	1039	1081	1122	1161	1199	1236	1272	1307	1341	1374	1406	1437	1468	1499	1529	1558	1586	1614	1642
210			928	974	1019	1064	1107	1149	1189	1229	1264	1298	1336	1374	1408	1441	1473	1505	1536	1566	1596	1625	1654	1683
220				1000	1042	1089	1133	1176	1217	1258	1291	1324	1365	1406	1441	1475	1508	1541	1572	1603	1634	1664	1693	1722
230				1019	1067	1114	1159	1203	1245	1286	1323	1359	1398	1437	1473	1508	1542	1575	1607	1639	1663	1701	1724	1761
240					1091	1138	1184	1229	1272	1314	1354	1393	1431	1468	1505	1541	1575	1609	1642	1675	1692	1738	1754	1799
250					1111	1162	1208	1254	1298	1341	1380	1422	1458	1499	1533	1572	1606	1642	1675	1709	1733	1774	1797	1836
260						1184	1232	1278	1323	1367	1406	1450	1484	1529	1560	1603	1636	1675	1708	1743	1774	1809	1840	1872
270						1207	1256	1303	1349	1401	1433	1478	1515	1557	1592	1634	1668	1692	1741	1776	1808	1843	1875	1908
280							1279	1327	1374	1435	1460	1505	1546	1586	1624	1664	1700	1738	1774	1809	1842	1877	1910	1943
290							1302	1351	1400	1452	1486	1532	1573	1614	1653	1693	1729	1754	1804	1841	1873	1910	1939	1977
300								1374	1425	1469	1512	1558	1600	1642	1682	1722	1758	1799	1834	1872	1904	1943	1968	2011
320									1469	1516	1564	1610	1654	1696	1738	1778	1816	1859	1894	1932	1970	2008	2024	2078
340										1564	1612	1658	1704	1748	1792	1833	1872	1915	1954	1993	2032	2069	2096	2141
360											1658	1706	1754	1800	1844	1886	1928	1971	2012	2050	2090	2128	2166	2204
380												1753	1802	1848	1894	1938	1982	2025	2066	2107	2148	2187	2226	2264
400												1800	1848	1900	1944	1990	2034	2077	2120	2162	2204	2244	2284	2322
425														1950	2014	2056	2077	2142	2187	2226	2268	2317	2353	2396
450														2014	2056	2120	2150	2190	2200	2300	2332	2374	2417	2459
475																2175	2210	2268	2310	2353	2416	2445	2480	2523
500																		2332	2370	2412	2459	2523	2565	2608

FORMULA.

N = S
Ldπ or S
Ld3.1416.

Where S = whole surface,

Where L = length,

Where d = diameter, in feet,

Where π = 3.1416,

Where N = the number.

Example.