vis4valentine@lemmy.ml to Asklemmy@lemmy.ml · 1 year agoWhat is an extremely dangerous thing that we use daily?message-squaremessage-square185fedilinkarrow-up1246arrow-down15
arrow-up1241arrow-down1message-squareWhat is an extremely dangerous thing that we use daily?vis4valentine@lemmy.ml to Asklemmy@lemmy.ml · 1 year agomessage-square185fedilink
minus-squaredeejay4am@lemmy.worldlinkfedilinkEnglisharrow-up3·1 year agoYou wouldn’t be able to lift the door without the spring acting as a counterweight. It’s usually a big roller just above the doorway on the inside (right near where the track curves in) with cables that run down to the bottom door panel. So yeah, huge spring under constant tension.
You wouldn’t be able to lift the door without the spring acting as a counterweight. It’s usually a big roller just above the doorway on the inside (right near where the track curves in) with cables that run down to the bottom door panel.
So yeah, huge spring under constant tension.