Page:Shop management.djvu/171

 

Material	Throw		Length of walk	Actual Continuous Work with no Allowances for Rest or other Stops										Per cent. of runs	Allowing for Rests and other Necessary Stops
	Vertical	Horizontal		Time to fill shovel	Time to throw shovelful	Time walking with load	Time of back walk	Total time of complete operation	Volume of shovelful	Weight of shovelful	No. shovelfuls per minute	No. cubic yards per hour	No. pounds per hour		No. shovelfuls per minute	No. cubic yards per hour	No. pounds per hour
Sand, or Sandy loam	Feet	Feet	Feet	Min.	Min.	Min.	Min.	Min.	Cu. ft.	Lbs.	Shovels	Cu. yds.	Lbs.	P. c.	Shovels	Yards	Lbs.
	4	5		0.073	0.031			0.104	0.16	16	9.6	3.4	9,230	30	7.4	2.6	7,100
	6	5		0.073	0.043			0.110	0.14	14	8.6	2.7	7,250	30	6.6	2.0	5,580
	8	5		0.073	0.056			0.129	0.11	11	7.8	1.9	5,120	30	6.0	1.4	3,940
	4	712		0.073	0.043			0.116	0.14	14	8.6	2.7	7,250	30	6.6	2.1	5,530
	6	712		0.073	0.056			0.129	0.12	12	7.8	2.1	5,590	30	6.0	1.6	4,300
	4	10		0.073	0.058			0.131	0.13	13	7.6	2.2	5,960	30	5.9	1.7	4,830
	6	10		0.073	0.076			0.149	0.11	11	6.7	1.6	4,440	30	5.2	1.3	3,420
			20	0.073	0.020	0.080	0.080	0.253	0.20	20	4.0	1.8	4,750	5	3.8	1.7	4,520
			30	0.073	0.020	0.120	0.120	0.333	0.20	20	3.0	1.3	3,600	5	2.9	1.3	3,430
Loam, gravelly
	4	5		0.092	0.031			0.123	0.14	15.8	8.1	2.5	7,700	30	6.2	2.0	5,920
	6	5		0.092	0.043			0.135	0.13	14.7	7.4	2.1	6,520	30	5.7	1.6	5,015
	8	5		0.092	0.056			0.148	0.10	11.3	6.8	1.5	4,580	30	5.2	1.2	3,530
	4	712		0.092	0.043			0.135	0.13	14.7	7.4	2.1	6,510	30	5.7	1.6	5.010
	6	712		0.092	0.056			0.148	0.11	12.4	6.8	1.6	5,030	30	5.2	1.3	3,870
	4	10		0.092	0.058			0.150	0.12	13.6	6.7	1.8	5,440	30	5.1	1.4	4,180
	6	10		0.092	0.076			0.168	0.10	11.3	6.0	1.3	4,030	30	4.6	1.0	3,100
			20	0.092	0.020	0.080	0.080	0.272	0.19	21.5	3.7	1.6	4,750	5	3.5	1.5	4,520
			30	0.092	0.020	0.120	0.120	0.352	0.19	21.5	2.8	1.2	3,670	5	2.7	1.1	3,490
Gravel, medium
	4	5		0.084	0.031			0.115	0.12	17	8.7	2.34	8,870	30	6.7	1.8	6,820
	6	5		0.084	0.043			0.127	0.10	14.2	7.9	1.8	6,720	30	6.0	1.3	5,170
	8	5		0.084	0.056			0.140	0.08	11.4	7.1	1.3	4,880	30	5.5	1.0	3,750
	4	712		0.084	0.043			0.127	0.11	15.6	7.9	1.9	7,370	30	6.0	1.5	5,670
	6	712		0.084	0.056			0.140	0.09	12.8	7.1	1.4	5,480	30	5.5	1.1	4,220
	4	10		0.084	0.058			0.142	0.10	14.2	7.0	1.6	6,000	30	5.4	1.2	4,620
	6	10		0.084	0.076			0.160	0.08	11.4	6.2	1.1	4,270	30	4.8	0.8	3,280
			20	0.084	0.020	0.080	0.080	0.264	0.15	21.3	3.8	1.3	4,840	5	3.6	1.2	4,610
			30	0.084	0.020	0.120	0.120	0.344	0.15	21.3	2.9	1.0	3,720	5	2.8	0.9	3,540

Table 3.—Shoveling Earth in Average Contract Work

Earth Previously Loosened—Volumes are Based on Measurement in Cut