Modular set to provide easy solution for safe roof access paths. Model represent high stairs module with railings: height = 1000mm; width = 1000mm; angle = 45deg. Check "Example 1" or "Example 2" model to see combined HS-SP-LS modules. Walraven BIS Yeti® roof supports allow safe load distribution on roof layers without punctures to water insulation layer. For more details about solutions contact: firstname.lastname@example.org; or visit www.walraven.com Short delivery time , 3 options of ordering: a) fixing rails plus accessories with manual to cut and assembly by installer, b) fixing rails cut plus accessories with manual for easy assembly by installer, c) pre-assembled components for quick & easy assembly by installer. Various applications also for AC unit If you need other solutions please check alternative modules or contact us, we can provide customized roof top solutions which you need.