Yes, provided it is designed and tested to exceed local and national safety regulations, including the following OSHA Standard 29 CFR 1910.29, OSHA Standard 29 CFR 1926.501, 29 CFR 1926.502, Canadian National Building Code 4.1.10.1(1)(e), 4.1.10.1(2), 4.1.10.1(4), Ontario Building Code Section 4.1.10.1(1)(b), 4.1.10.1(2), 4.1.10.1(4), HSG-33 Health & Safety in Roof Work, HSE Specialist Report No 15: 1988, HSE Sheet 21 “Working on Flat Roofs Protection Against Falls”, BS 6399: Part 2 1995 Wind Code, EU Directives & CDM Regulations, BGV A1: 2000, BGG 928 & BGR 184, Health, Safety & Welfare Regulation 13 “Falls or Falling Objects” 1992, NFE 85-003, EN ISO 14122: PT3, EN 1337.