The Drain with sight rails at chainages of 60 m and 120 m is to be set out. However, in order to facilitate the setting

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The Drain With Sight Rails At Chainages Of 60 M And 120 M Is To Be Set Out However In Order To Facilitate The Setting 1 (27.25 KiB) Viewed 67 times

The Drain with sight rails at chainages of 60 m and 120 m is to be set out. However, in order to facilitate the setting out, the data below were associated with the drain in question. Reduced level of Temporary Bench Mark (TBM)= 28.260 m amsl Bach sight reading to the TBM = 3.855 M Ground level at 60 m chainage = 28.650 m Invert level at 60 m chainage = 27.175 m The length of the traveler = 2.000 m Gradient: 1 in 30 rising from 60 m to 120 m chainage. Compute staff readings when placed on top of the sight rails at 60 m and 120 m.