5 Meter Dumpy Level Staff

+1

1

Chapa Mpya

Hali

Nyingine

Aina

Anwani ya duka

Kiambu • Ruiru

New home bussiness center ruiru, next to kcb bank, 2nd flr rm 211

We R along thika road, ruiru town next to kcb bank or opposite equity bank ruiru and petanns driving

Open

• Jumatatu - Jumapili, 08:00-19:30

A Back Sight (BS) is the first staff reading taken after setting up the level instrument. It is taken on a point whose elevation (RL) is already known, such as a Benchmark (BM). Purpose of Back Sight • To determine the Height of Instrument (HI) • To transfer the known elevation to the level line of sight How Back Sight Reading is Taken 1. Set up and level the instrument. 2. Place the level staff vertically on a benchmark or known point. 3. Read the value where the crosshair cuts the staff. 4. This reading is the Back Sight (BS). Formula Used {Height of Instrument (HI)} = {RL of BM} + {BS}

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