DL/T 5486-2020 in English
VALIDTechnical specification for the design of steel supporting structures of overhead transmission line
- Issued on:2020-10-23
- Implemented on:2020-12-01
- File Format:PDF
- Delivery:Via email within 10 business days
Price(USD)：
$2,000.00
$1,940.00
$1,940.00
Introduction
Background of Standard Revision and Technological Evolution
The 2020 version of the standard integrates four old standards, including DL/T 5486-2013 and DL/T 5254-2010. The main technological breakthroughs are reflected in:
| Technical Dimensions | 2013 Edition | 2020 Edition |
|---|---|---|
| Scope of Application | UHV Lines | Full Voltage Levels (Including Large Span) |
| Material Resistance Coefficient | Fixed Value | Dynamic Adjustment Mechanism |
| Calculation method for steel tube tower | Simplified formula | New calculation of plug plate/ring plate nodes |
Analysis of core design points
4.1 Material technical requirements
Steel selection follows the gradient principle of Q235→Q355→Q420, and it is clear that:
- Thickness ≥40mm must use Z-direction steel (GB/T 5313)
- Carbon equivalent of welded structure must be tested
- -40℃ environment must meet the requirement of impact energy ≥27J
6.2 Design of steel tube components
Three new key calculation formulas are added:
Bearing capacity of plug-in plate connection: Fe=min(Feb, Fev, Fep)
Stress of ring plate node: σ=γ·(N/An+M/Wn)
Implementation suggestions for comparison of new and old standards
Things to note during the transition period
- New projects after February 1, 2021 must implement the 2020 version
- The original design standard can be used for the reconstruction of existing lines
- Focus on the adjustment of the steel resistance partial coefficient (γR changes by 8%)
Typical structural optimization direction
| Structural type | Optimization measures | Material saving effect |
|---|---|---|
| Angle steel tower | Use the revised main diagonal material calculation length formula | 5%~8% |
| Steel tube tower | Apply the newly added ring plate node design method | 10%~15% |
Sample only — not a preview of DL/T 5486-2020
Loading PDF document...
Error loading PDF. Please make sure the file is valid and try again.
We also recommend
-
DL/T 790.12-2001 in English
Distribution Automation Using Distribution Line Carrier Part 1: General Provisions Part 2: Guidelines for Formulation of Specifications
2001-12-26
