← 1.1 Safety on Raised Platforms
Scaffolds, trestles and mobile platforms
Pre-Technical Studies · Grade 9 · about 40 minutes
A scaffold needs rails, ties and a load limit. Trestles and step stands stay short and locked. Mobile towers move empty with wheels locked to work.
Sign in to read this lesson
Lessons are for learners and teachers with an account. Browsing the curriculum — subjects, strands and what each sub-strand covers — stays open to everyone.
- 9 sections of explanation, worked examples and diagrams
- 1 practice task with hints and worked answers
- A quiz that marks itself as you go
- Your progress kept across every subject you take