Categories: Safety Guides FISA 306 Chainsaw clearance of windblow This leaflet applies to the manual harvesting of areas where the majority of adjacent trees have been windblown or broken and also to sporadic windblow, within or outside standing crops. Mechanised systems should be considered as a safer alternative. Documents to download FISA 306 Windblown Clearance.pdf(.pdf, 408.12 KB) Previous Article FISA 304 Next Article FISA 307 Print