ABSTRACT
Pinchers:- Two poling boards strutted apart. Fig 1 In good ground spaced approx 1.5m to 2m centres
FIG 2 OPEN POLING IN MODERATELY FIRM GROUND
Poling boards:- Vertical boards 1m to 1.5m long, 150mm to 225mm wide, 31mm to 50mm thick supporting sides of excavation. Figs 1 to 3.
