Owner`s manual

May 23, 2013
7075-166C
Page 33
    e r 
R
. u ig ere Fr r ei
eri
er  u ii  ue
7KHNYDOXHLQGLFDWHVWKHDPRXQWRIKHDWLQ%78¶VWKDW
ZLOOÀRZLQKRXUWKURXJKVTXDUHIRRWRIDXQLIRUPPDWH-
ULDOLQFKWKLFNIRUHDFKGHJUHH)RIWHPSHUDWXUHGLIIHU-
ence from one side of the material to the other.
he LWR the k factor means less heat is being con-
ducted through the non-combustible material to the com-
bustible material beneath it.
he k value of a material must be eual or smaller then the
reuired k value to be acceptable.
%78LQFK
IRRW
2
KRXU
o
)
e r    e i  e   ue
he R value is a measure of a materials resisteance
to heat transfer.
R value is convenient when more than one material is
used since you can add the R values together, where-
as you can not do this for k value.
he R the R factor means less heat is being
conducted through the non-combustible material to
the combustible material beneath it.
he R value of a material must be eual or larger then
the reuired R value to be acceptable.
e r ig    
Divide 1 by k and multiply the results times the thickness
in inches of the material.
R  1/k  inches of thickness
e r ig   
Divide the inches of thickness by R.
k  inches of thickness/R
u 
ample: loor protection reuires k value of 0.4 and 3/4
inch thick.
$OWHUQDWLYHPDWHULDOKDV DNYDOXH RIDQG LVLQFK
thick.
Divide 0.6 by .75  k value of 0.0. his k value is smaller
than 0.4 and therefore is acceptable.