200x75 or 200x100? The size difference comes down to load, span and what you're actually building — here's which one fits your project.
A straight-talking buyer's guide to treated pine sleepers — H4 treatment explained, 200x75 vs 200x100 sizing, and how many you'll need for your project.
Everything you need to plan a timber sleeper retaining wall — treated pine sizing, steel post spacing, drainage and Australian height limits, in one guide.
