Brazil. Actually I found out that now the more popular system for this kind of door there doesn't even use counterweights or springs, but an endless screw insi

Brazil. Actually I found out that now the more popular system for this kind of door there doesn't even use counterweights or springs, but an endless screw inside a rail or a linear gear. https://ppa-rp.com.br/item/motor-de-portao-basculante-ppa-home-jetflex-14-hp-abertura-rapida https://ppa-rp.com.br/item/motor-de-portao-basculante-ppa-ho... max door weight = 250kg https://ppa-rp.com.br/item/motor-de-portao-basculante-ppa-bv-condominium-jetflex-12-hp-braco-150-mts-abertura-rapida https://ppa-rp.com.br/item/motor-de-portao-basculante-ppa-bv... max door weight = 500kg For reference: 5.0 R$ ~= 1.0 USD 250 kg ~= 550 lbs