354 Introduction of the. Iron Chain Suspension Bridge, 
[Dec. 
1. Estimated expense of a Rope-bridge of 165 feet span. 
R. A. P. I 
R. 
A. 
Standards, platform, &c. 
450 fins, of 54 inch rope, wt. 3200 lbs. 28b 
0 
750 44 
3600 
315 
0 
410 24 
500 
100 
0 
1000 ft. twine. 
40 
0 
400 netting. 
44 
0 
•ivv/ ULl'lllIg) ■* * ” 
Iron work, bars, bolts, thimbles, rings, 1,500, 
Standards, platform, &c. as before, 
Iron work, (say) 60 maunds at 10 Rs. 
Probable expense of transmission to Futteligurh, 
* Carriage to Ahnorah, putting up and every possible 
contingency, 
R. A 
L* 
P. 
470 
0 
0 
787 
0 
0 
318 
4 
0 
s. 1575 
4 
0 
;. 1,507 
a 
0 
span . 
R. 
A. 
p. 
470 
0 
0 
600 
0 
0 
50 
0 
0 
250 
0 
0 
Total, Sa. Rs. 1,370 0 0 
By these estimates the expense of the chain-bridge appears to be j 1 , less than that 
of the rope-bridge. 
But in reality the saving is far beyond this, as we shall be able to shew in a few 
words. It appears, that such a rope bridge would only last two years, i. e. the rope- 
work; and even to last this time, it must be taken down and put under cover for 
eight months out of the 12. These circumstances make a wonderful difference in 
the comparative economy of the two erections ; and to show the real amount of this 
difference, let us take a period of 10 years, a period which a chain-bridge certaiuly 
will outlast, and during which it requires no looking after. 
Estimated expense of a Rope-bridge of 165 ft. span for a period of 10 pears. 
R. A. P. 
Five sets of ropes, each set as above 787 Rs. lasting 2 years, 
Standards as before, 
Iron work as before, 
Establishment and expenses of storehouses at 250 Rs. per 
annum, 
3,935 
470 
318 
2,500 0 0 
Total, Sonat Rs. 7,233 4 0 
or, Sicca Rs. 6,911 14 6 
This is SIX times the expense of the chain-bridge. And that the estimate of 
the latter is not under-rated, will be evident from the fact, that a bridge of 1/0 ft. 
span was afterwards dispatched, weighing 66 mds. 36 seers, Fy. Wt. t and cost- 
ing Rs. 737. 
A particular advantage which the iron chain-bridge has over the rope-bridge, as 
applicable to these mountains, is in tiie facility of carriage. We have seen that the 
weight of the bridges are, strength for strength, as two to one. This is much, but it is 
not all. The size of the bars which go to form the chain may' be varied at pleasure, so 
as to be portable in any situation, and by any means, whether by hill porters, ponies, 
mules, bullocks, elephants, or wheel carriages. Tor instance, suppose them one inch 
square and 10 feet long ; such a bar would weigh 37 pounds avoirdupois, which may 
* It was found that the actual expense of transmission to Bareilly amounted to 
about 50 Rs. The land carriage thence to the fool of the hills may be reckoned 
about four anuas a rnaund, or even less. The hill carriage by porters ( the most ex- 
pensive) is at the rate of one rupee for every 30 seers (Baz. wt.) carried 44 miles. 
This includes return hire. Some of the bridges required by Government are much 
nearer than Almdrali, one not more than five miles from the foot of the hills. 'J he 
above estimate is certainly above the medium charge, 
t The factory maund is ten per cent, lighter than the bazar. 
