Posted By Steve Fitzpatrick I have seen a lot of different types of temporary scaffold roofs erected. All are very hazardous to erect due to scaffolders having to work at height and straddle the prefabricated beams (often with single lanyards and occasionally none!). This hazardous method of work is normally when fixing sheeting and some other components. I recently witnessed the Haki 750 roll out roof system being erected. The scaffolders erected the roof from a gable end with a table lift but always from behind guard rails. They simply erected each bay and pushed the roof out along the pre-installed triangular track/rail. The Haki trak sheeting is also pulled over the roof structure by ropes via the existing grooves/tracks before the roof is pushed along making it weather tight. The roof was erected several times quicker than any other temporary scaffold roof i have seen. Now my question? Considering the Work at Height regulations and the hierarchy of controls where as we know collective fall prevention is first choice and fall arrest should be a last. How can any design engineer, particularly scaffold designer justify specifying other types of roof? Why are all knowledgeable clients or principal contractors not using these roofs? I would be interested in any other views/opinions on this subject from any scaffold experts out there. Has anyone else seen these roofs being erected? What were your thoughts?