1 1 2 hour rating.
B label hollow metal door.
Standard metal doors are 1 3 4 thick and are prime coat painted.
Mechanical or electrical rooms.
For this reason all components of the door must include a rating label including the door panel the door frame locksets gaskets hinges and door protection plates.
Mesker door offers a full array of fire rated hollow metal doors including 3 hour 1 1 2 hour or 90 minute 3 4 hour or 45 minute or 20 minute.
Fire rated wood doors are ordered in as needed.
These doors are usually used for stairwell doors but are sometimes used at all the rated walls in a building.
When combined all of the components of the door form an assembly that protects the opening.
For category a the intumescent seal must be built into the door thus hidden from plain view.
Hurricane wind load testing fbc wind load approvals on our doors and frames difference between fbc approvals and noa s wind speed to design pressure chart wind borne debris region.
Prior to shipment label each door and frame to show location size door swing and other pertinent information.
No glass is allowed in these doors.
B label fire rated doors are rated for one hour and half and c label doors are fire rated for three quarters of an hour.
B labeled steel doors are used primarily for stairwell doors and sometimes are used for other doors in a building i e.
Hollow metal doors are shown to have superior performance for strength and durability compared to the alternate materials.
These doors are used for openings in walls separating buildings that are joined together.
We are a ul certified fire label shop and can label our hollow metal doors and frames with up to 3 hour fire ratings.
Metal doors are more sanitary much easier to maintain and can withstand more abuse than wood or aluminum.
Most labeled doors will have an a b or c label.
Box 7269 monroe la 71211 318 361 0796 fax 318 323 5068 dhi door and hardware institute ul door swing chart approval distributor single doors pairs of doors no.
If the requirement is for category b the frames must have the intumescent seal applied to the rabbet of the frame.
Store doors and frames at the site under cover.
For wood doors with 20 45 60 90 minute ratings the rule is simple.
The gray primer finish is suitable for painting.
Protect from rust and damage during storage and erection until completion.
B label 1 hour rating for 2 hour wall.
1 7 storage and handling a.
Hollow metal doors and frames p o.
B label 1 hour c label hour d.
C label hour rating for 1 hour wall.
Revision date drawn.
We keep 18 gauge hollow metal doors in stock with 16 and 14 gauge hollow metal frames.
There are some basic requirements for an opening before it can be classified as fire rated.
C labeled steel doors are used primarily for openings from a corridor into another room in the same building.
