Before considering a bill of material as finished, it is well to look it over to 
see that no mistake has been made in the number of the pieces. It is not an un- 
common error to pufc clown only half the correct number. 
As soon as tho bills of iron anti lumber arc made out and checked, the dead 
oa ヴ 州 foot should bo calculated, to soe if it agree with tho one assnrned within the 
luait specified in Chapter VI. 
Estimates of cost should bo liberal ； foi*, as a rule, tho actual profits on bridges 
こ 11 short of the amounts estimated. They can be made very readily by using a 
〕 ank «i^ilar to the following : — 
^»thnatcon Jhldftc across 
Lenfjth 巧 ) a", 'ft. Height .ft. Clear Boadway 
Static Load per lineal ft” 1bf(. Motvinff 
ノ む， Ih?. Weight of engine Ihs on,. 
-Vo. of Panels Length of Panels ... 
,oad p 
... @ 
... @ 
loads @ 
押 
^ TönghtAron, lbs 
Cau-iron, Jbs 
dumber, ft ... .. 
PiI cs t ft 
Jfaulinff > ,,, , 
Fre Wht 
Fra — 
■FaUcioork 
五 軸’ ⑽ 
Painting 
^acksmitMng 
Coal 
•* • • 參 # . . . • • • ••• •• 
Freif J ht on tools 
Travelling expenses 
Men ' 8 travelling 
^gineering expenses 
1 eam ^9 during construction ... • 
Incidentals 
Total cost of biid/je 
Cost per lineal foot 
On fair country roads a day's work for one man may be averaged at 500 pounds 
awn ») i’i， that for a horse 1600 pounds drawn 5 ri and that for a bullock 8800 
1 ounds drawn 4 ri : this allows for the time lost in returning with tho empty carts::: 
The aesigniug of falsework will be treated in Chapter XXII. Its cost will 
c u e that of the piles iu place, if any be required, and that of the lumber, to which 
i, ° U ( >e at Wed about two yen per thousand for framing and raising, and a yen per 
ousand for taking down. Falsework timber can generally be sold for something 
11 ie bridge is completed : so a reduction may be made iu its cost when the 
Ornate is to bo a close one. 
lineal 
wheels 
ft. 
These data have been obtained through the courtesy of Ta^unobu Kono, Esq. M. E. Assistant 
Enpneer *Tokio-Taka S aW E-y. 
