What is the primary purpose of IS 11288?

To provide guidelines for planning and executing the off-road movement of timber using various methods like animal logging, ground skidding, and cable systems.

Does this code specify which type of vehicle to use?

It provides recommendations on selecting appropriate equipment (like tractors, skidders, forwarders) based on operational factors, but does not mandate a specific make or model.

What is the recommended maximum grade for a logging road when a loaded truck is moving uphill?

The code suggests a maximum adverse grade of around 10% for efficiency and safety.

Does the code cover road construction?

It provides recommendations on the planning aspects of forest roads, such as alignment, gradient, and width, but not detailed construction specifications.

IS 11288

: 1985

Recommendations for off-road transportation of timber

CurrentSpecializedGuidelinesTransportation · Timber and Timber Stores

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This standard provides recommendations for the off-road transportation of timber from felling sites to collection points or main roads. It covers the selection of transportation systems, planning of extraction routes like skid trails and forest roads, and the use of various logging equipment. The guidelines aim to ensure efficient and safe timber extraction with minimal environmental impact.

Recommendations for off-road transportation of timber

Quick Reference Values

Maximum Favourable Grade (Loaded Downhill)18 %

Maximum Adverse Grade (Loaded Uphill)10 %

Minimum Curve Radius on Main Forest Roads20 m

Recommended Road Width (Single Lane with turnouts)3.5 m

Maximum Skidding Distance for Tractors500 m

Practical Notes

The choice of equipment (e.g., skidders vs. forwarders vs. cable systems) is highly dependent on terrain, soil conditions, timber size, and environmental constraints.

Proper planning of extraction routes (roads, trails) is critical to minimize soil erosion, compaction, and damage to the remaining forest stand.

Adherence to recommended road gradients and curve radii is essential for vehicle safety, operational efficiency, and minimizing road maintenance costs.