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only 21,130 square feet for the iron as against 24,910 for wooden roof. The wooden roof without purlins and match boarding would be 82 cents per square foot or a total of $20,426 and the iron roof of 21,130 square feet to cost $20,426 would work out at 97 cents per square foot. I certainly think that an iron roof could be supplied and erected complete for less than this amount. The wooden purlins and match hoarding to be added out
here.
7.
I would therefore ask you to consider the matter of the roofing and if you think an iron roof more suit- able and cheaper I would send home an indent for same but in the meanwhile you could be designing it.
8. One point I think ought not to be lost sight of and that is that the Chinese Section is only being built for single line (i.e. the masonry is not being put up for double line Bridges) and I consider that far more trains can be handled at the platform with two faces as shown than on the single line between San Chun and Canton. The station roof will therefore he required to stand until there is some indication of the Chinese doubling their section and for this reason an iron roof I consider preferable.
9. I think the same spans should be adopted for a steel roof with steel H. section posts well omhedded in concreto as the vind pressure in a typhoon will be very strong. The principals should also consist of L.I. or T.I. not round bars so as to give extra stiffness. The purlins should be of wood (supplied out here) and spaced suitable for 5/8 inch match boarding.
10.
I send by this mail en indent for Permanent Way tools and plant. I require only the wheels and axles for heavy plate-laying trollies I will make the bodies out here.
The
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