Aquaculture Engineering (2+1)

Levelling Staff - Folding level staff in metric units

Unit 1- Surveying

Levelling Staff

Folding level staff in metric units

Folding level staff is in 4 m length. The staff comprises 2 m thoroughly seasoned wooden pieces with the joint assembly. Each piece of the staff is made of one longitudinal strip without any joint. The width and thickness of staff is kept 75 mm and 18mm respectively. The folding joint of the staff is made of the detachable type with a locking device at the back. The staff is joined together is such a way that

• The staff may be folded to 2 m length.
• The two pieces maybe detached from on another when required facilitating easy handling and manipulating on with one piece.
• When the two portions are locked together the two pieces become rigid and straight. Each meter is subdivided into 200 divisions the thickness of graduations being 5mm.