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The Honourable
F. H. May, C.M.G.,
Colonial Secretary,
Sir,
Hongkong.
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449
Resident Engineer's Office,
Causeway Bay,
Hongkong, 8th. May, 1903.
By this mail 1 have received intimation from the Consulting Engineers, Messrs. Dickinson and Company that ere this you would be in receipt of a communication from the Colonial Office with reference to the type of permanent way construction to be adopted here in Hongkong.
As you are aware this question has not, up to the present, been finally settled although the construction has been commence ed on certain portions of the route where no difference of opinion existed as to the amount of concrete necessary to support the track. The type of construction there being used, and
which we recommend as being in every way satisfactory for the whole system is shewn on the sketch below.
18 →→→
18
The concrete under the rails is 18 inches by €
inches and the surface concrete is 6 inches in depth. This forms a thoroughly efficient permanent way, and anything further is unnecessary.
In the case of double line, where the inner rails
are not more than 4 feet apart the 6 inches of surface concrete extends from rail to rail and 18 inches outside each rail as shewn below,
418"~7
CONCRETE
مین
but in the case of double line with centre poles where the tracks are more than 4 feet apart the surface concrete would only extend 18 inches
outside