Sigma Greenhouses What are the snow load and wind resistance on the Sigma models? Sigma models (Gen II) can hold a snow load weight of 32 psf (160 kg / m2) or 3ft of fresh snow on top of the greenhouse. Sigma models (Gen III) can hold a snow load weight of 55 psf (265 kg / m2). The wind resistance is 65 mp/h (100km/h). Share Share Link Close share Copy link Back to FAQs
