Max. Door Height x Width:: 3000 x 1500 mm Max. Door Weight:: 90 Kg Door Thickness:: 33-50 Kg features: Marathon Fire Door Kit is produced in one standard size for use with the various Marathon sliding door sets Fire rated for use on single doors which do not require self closing Easily operated sliding action For doors over 44mm thick the track needs to be packed from behind to reduce door offset It is required that intumescent fire seals be incorporated into the door framework to contain the fire within the fire area (do not use smoke seals as this will hinder self closing action - seals can be viewed in the Miscellaneous Products section To be used for fire control only. Cannot be used for smoke control