B labeled steel doors are used primarily for stairwell doors and sometimes are used for other doors in a building i e.
B label hollow metal door.
Most labeled doors will have an a b or c label.
1 1 2 hour rating.
The gray primer finish is suitable for painting.
We keep 18 gauge hollow metal doors in stock with 16 and 14 gauge hollow metal frames.
Fire rated hollow metal frames complete fire rated frame information including a b and c label frames along with the requirements of a fire rated opening.
Prior to shipment label each door and frame to show location size door swing and other pertinent information.
Hollow metal doors and frames p o.
For wood doors with 20 45 60 90 minute ratings the rule is simple.
B label 1 hour c label hour d.
B label 1 hour rating for 2 hour wall.
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.
Metal doors are more sanitary much easier to maintain and can withstand more abuse than wood or aluminum.
When combined all of the components of the door form an assembly that protects the opening.
C labeled steel doors are used primarily for openings from a corridor into another room in the same building.
1 7 storage and handling a.
Fasten temporary steel spreaders across the bottom of each door frame.
There are some basic requirements for an opening before it can be classified as fire rated.
C label hour rating for 1 hour wall.
No glass is allowed in these doors.
If the requirement is for category b the frames must have the intumescent seal applied to the rabbet of the frame.
In other cases the entire assembly including all hardware has a single rating.
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.
Mechanical or electrical rooms.
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.
These doors are used for openings in walls separating buildings that are joined together.
Store doors and frames at the site under cover.
Standard metal doors are 1 3 4 thick and are prime coat painted.
Protect from rust and damage during storage and erection until completion.
These doors are usually used for stairwell doors but are sometimes used at all the rated walls in a building.
For category a the intumescent seal must be built into the door thus hidden from plain view.
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.
We are a ul certified fire label shop and can label our hollow metal doors and frames with up to 3 hour fire ratings.
Revision date drawn.
