Forest Production & Wood Utilization

A Bill Hook is a traditional versatile curved cutting tool used in forestry and coppice management:
Its hooked blade with a sharp inner curve makes it the ideal ergonomic hand tool for slicing through thin woody stems, harvesting bamboo culms, pruning branches, lopping fodder, and clearing dense undergrowth and brushwood.
Pickaroons and Cant hooks are timber handling tools (for rolling logs), and axes are designed for heavy felling and splitting.

Detailed analysis of options:

• 20-35 cm: Higher than the optimal standard felling practice.
• 15-30 cm: In scientific timber harvesting and Indian forest logging rules, the stump height should be kept as close to ground level as possible, strictly within 15-30 cm, to minimize valuable timber loss and facilitate regeneration.
• 25-40 cm: Results in excessive wastage of the most valuable basal butt-log portion.
• 30-45 cm: Unacceptable logging loss.

Detailed analysis of options:

• $20^\circ$: Too narrow, causes log jamming and excessive hydraulic pressure.
• $30^\circ$: Sub-optimal deflection angle.
• $40^\circ$: In river timber floating operations, a V-shaped boom (catching boom) has its arms inclined at an angle of $40^\circ$ relative to the flow to deflect floating logs smoothly toward the landing bank without breaking or piling up.
• $50^\circ$: Too wide, causes severe impact forces from logs against the boom cable/timbers.