Specifications for Substation Ascending Operation and Protective Device（DL/T 1209） is divided into four parts：
　　Part 1： Holding Bar Ladder， Ladder Utensil， Ladder Platform and Bridge.
　　Part 2： Demountable Maintenance Platform.
　　Part 3： Lift Maintenance Platform.
　　Part 4： Composite Quick-installed Scaffold.
　　This is part 4 of DL/T 1209.
　　This part is proposed by and under the jurisdiction of China Electricity Council（CEC）.

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Technicalrequirements
5 Typetest
6 Acceptancetest
7 Preventive test
8 Inspectionrules
9 Packaging，transportation and storage
Annex A （informative） Swing fatigue test device