IS 6056:1970 is the Indian Standard (BIS) for jointed wood poles for overhead power and telecommunication lines. This standard provides specifications for the materials, dimensions, and construction of jointed wood poles used for supporting overhead power and telecommunication lines. It covers types of joints, such as scarf joints and butt joints with fish plates, and the requirements for timber selection and preservative treatment.
jointed wood poles for overhead power and telecommunication lines
| Parameter | IS Value | International | Source |
|---|---|---|---|
| Primary Subject | Jointed wood poles from two or more pieces. | Primarily solid, single-piece wood poles. | ANSI O5.1-2017 |
| Specified Timber Species (Example) | Sal (Shorea robusta), Teak (Tectona grandis), Deodar (Cedrus deodara). | Eucalyptus species (e.g., E. globulus, E. pilularis), Radiata Pine, Cypress Pine. | AS 2209:2000 |
| Joint Design Specification | Provides detailed drawings and dimensions for scarf and bell-and-spigot type joints. | Does not specify pole joints; refers to general timber engineering principles if joints are required. | BS EN 14229:2010 |
| Strength Classification | Designated by length and ultimate breaking load (e.g., 8m pole, 450 kg UBL). | Strength classes (e.g., C27, C32) based on characteristic bending strength, stiffness, and density. | BS EN 14229:2010 |
| Straightness Tolerance | Sweep not to exceed 1% of the pole's total length. | Sweep in any 3m section shall not exceed 25 mm. | AS 2209:2000 |
| Preservative Treatment | Specifies Creosote and CCA (Copper-Chrome-Arsenic) as per related IS codes. | Specifies a wider range including CCA, ACQ, CuN, and PCP, with detailed retention zones and environmental considerations. | ANSI O5.1-2017 |
| Marking Requirements | Marking includes manufacturer, year, species, length and class. | Requires a tag/brand with producer, plant location, year, species, preservative type and retention, and pole class/length. | ANSI O5.1-2017 |