What is the standard method for unloading concrete poles?

Poles should be unloaded using a crane or derrick with suitable slings. Dropping or uncontrolled rolling is strictly prohibited. (Clause 4.1)

What is the recommended setting depth for a concrete pole in the ground?

In normal soils, the setting depth should generally be 1/6th of the pole's overall length. This may need to be increased in poor soil conditions. (Clause 5.4)

How should concrete poles be stacked at a storage site?

Stack them horizontally on firm, level ground using wooden bearers. Stacks should not exceed 1.5 m or 5 layers in height. (Clause 4.2)

Where should slings be placed for lifting a pole?

For a single-point lift, the sling should be at the center of gravity. For a two-point lift, slings should be placed at approximately 0.2 times the pole length from each end. (Clause 4.1.2)

IS 7321

: 1974

Code of practice for selection, handling and erection of concrete poles for overhead power and telecommunication lines

CurrentSpecializedCode of PracticeBIMStructural Engineering · Cement Matrix Products

Download PDF BIS Portal Google

This code provides practical guidance on the selection, handling, transportation, stacking, and erection of both reinforced and prestressed concrete poles. It is intended for poles used in overhead power and telecommunication lines, ensuring their safe installation and structural integrity.

Code of practice for selection, handling and erection of concrete poles for overhead power and telecommunication lines

Quick Reference Values

Typical setting depth for poles in normal soil1/6th of the overall length of the pole

Recommended minimum distance of sling from pole end for lifting0.2 times the overall length of the pole

Maximum recommended stacking height1.5 meters or 5 layers

Maximum overhang during transportNot to exceed 1/3rd the length of the pole beyond the vehicle's body

Practical Notes

Poles must never be dropped, dragged, or rolled, as this can cause fine cracks that compromise structural integrity. Always use cranes and appropriate slings.

Ensure backfill around the pole base is compacted in layers to achieve the required stability and prevent leaning.

Verify pole orientation before erection, especially for poles with pre-drilled holes or a designated weaker axis for stringing.