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Here are all the possible meanings and translations of the word headroom. Princeton's WordNet(0.00 / 0 votes)Rate this definition: headroom, headway, clearance(noun) vertical space available to allow easy passage under something. headroom, dynamic headroom(noun) the capacity of a system to reproduce loud sounds without distortion. headroom(Noun) the vertical clearance above someone's head, as in a tunnel, doorway etc. headroom(Noun) the ability of a system to reproduce loud sounds free of distortion; dynamic headroom.
High lift equals distance from top of door to bottom of horizontal track. Maximum high lift equals headroom available minus 14. Sideroom = 4Â½ Required. Headroom = Top of door to nearest obstruction (truss, ceiling, or light fixture). Up to 3 of additional headroom may be required for a trolley door opener.