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Therma-Tru's TR 12-24 Steel Edge doors and door systems provide outstanding protection. Constructed with 24-gauge steel edges and tested to withstand at least 90 minutes of fire exposure at temperatures that reach more than 1,7000 degrees Farenheit, the doors are perfect for multi-family living and house-to-garage projects. Available in a variety of door styles, sizes and lock preperations, the units are suitable for a minimum 4" wall depth or greater. Therma-Tru also offers all the necessary components — frame, weatherstrip, bottom sweep and sill — to complete a 90-Minute Fire-rated door system.