Fire Rated Door Hollow Metal doors and frames get specified in many commercial and industrial buildings (probably because the steel holds up better than wood). The website for Dalian Golden House Door&Window Mfg Co.,Ltd shows the many options available for fire rated hollow metal products. This excellent website will give you more information about hollow metal doors and frames than you should ever need.
In recent years,many hollow metal frames with pre-finished wood doors have been used in many buildings. The hollow metal frames provides a durable way to complete the gypsum board openings and the pre-finished wood doors are attractive and economical. Wood frames, using wood trim boards around a wood jamb and header, are also popular. Wood frames tend to be site built, except for pre-hung wood doors.