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How Fire Rated Doors are Made and Tested

today I'll be talking about fire rated

doors including your Coors door

construction methods and the inspection

process plus I'll have a video of an

actual fire test for you come on I'll

show you how it's done

three of the most commonly specified for

for fire rated doors are honeycomb steel

seven Polly Saturday the honeycomb court

door is a real simple paper honeycomb

core that's bonded to the steel sheet

the second and second most common one is

the steel stiffened door where the steel

step there's our spot welded into steel

sketch the third is the polystyrene

however this door here because it's a

full glass door is very little

polystyrene it but we will see this

we're being fire tested later on in this

video the testing process can't begin

until the internationally recognized

testing agency send an inspector out to

the view of the doors prior to them

being assembled so he will come out to

inspect the cores the material the

bonding agents the glues of steel

stiffeners etc so he will come out with

spectra all these doors measure document

all the door construction prior to them

being assembled once they're fully

assembled the inspector will initial and

sign off that he watched the assembly of

these doors before they go out to the

testing laboratory for the fire test a

fire test must be conducted by an

internationally recognized independent

testing laboratory ratings are given in

time increments from 20 minutes to 3

hours as the test progresses the

temperature is steadily increased to

simulate conditions of a real fire as

you can see the door is securely

positioned in front of the furnace

the furnace is strictly controlled is

being continuously monitored for

temperature and pressure the furnace

that gets extremely hot it gets up to

1,500 degrees in less than 30 minutes at

90 minutes it reaches 17 hundred and 50

degrees and at three hours it's more

than 1,900 degrees the test isn't

complete until the host stream testing

portion of the test is completed when

you purchase a fire rated door from an

SDI member you know that your product

will meet your specifications deliver

the safety and durability that only a

steel door can deliver

you