This standard is defined in KS B ISO 5053 as 1 200 mm for the lifted operator's position.
KS B ISO 22915-21:2010 history
2020KS B ISO 22915-21:2020 Industrial trucks — Verification of stability — Part 21:Order-picking trucks with operator position elevating above 1 200 mm
2015KS B ISO 22915-21:2015 Industrial trucks-Verification of stability-Part 21:Order-picking trucks with operator position elevating above 1 200 mm
2010KS B ISO 22915-21:2010 Industrial trucks-Verification of stability-Part 21:Order-picking trucks with operator position elevating above 1 200 mm