Marco B36CF - Example of Determining Hearth Extension Equivalent; Metal Safety Strip-Offset (Supplied by Others); Non-Combustible Decorative Covering

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CXYT-J~;~ fa Imvl2:ing Board - %P.C 19 (R fram Fig~w-
37;
-77 X 1 = .S:"
-
.94
%%n!ttrv t41e material used, su?i'iciat ~&ichess must 52
Izi2 ?DW. tn m332k eq~i~~dcrt I< Fxtrx.
The 21mal ~JLX?~~ layer mzl; 52 cmr~r?d by my ncg-
cnmbustibIe rnttuizI such as rncmA, ?It, ~13:~~ brick, :lass,
concrete, marble or stoce. Whm usin: a low density
iwnlatine materid, a supportingmz~l cover mrh as show
iq ?!$re 38 s11wId be fzbrjea~d 2nd irrs.Aed. NOTE:
Sam? nonczrii5us:ible coverhp r~c5 2s m=:d, she, s~d-
stone acd m5le a--e relativ2y _rood conduc!ors of~~~t and
must b: 'xed in combinaticn wjll, the rnsre 5ermztly
reslstznt nstensh.
In finishing up
hearth extension, be sure to fasten it
szcllrely io 21s door :o preve3t sXfi;lrg, ;ad ses? 5e glp
i?r:wr.3 the firepiace hme ad t!~e heeh ~xt-ni~n wi:h 3
~c;.L-zo,y5;r~d?s~ e mztedd [Set? Fi~l--e 42:.
METAL COVER DESIGN CnNSlSTS OF
Fc TOP AND 3IQFS
I
65 REQUIRED
BY ZSIGN NOTCH CDRNERSTHEH
SEND FLANGES I@'
MATE?,lAL:
.?I e r.rlv. T~ICKNESS
:IEGA.) GflLVANIZE3 ?5" tAIN.
CR ALVI.71NIZEO STEEL
FaGbXE 38
E TT:L. S,Q"EFE' ST!?P-f)rTST'! ;SLT'?S5I2 Clr
CTREPS)
Wrh, t?lt ?~C$~CP ri5115:~rth I:x:sC~ ice no: k~srdled at
~TIFS~? heifzh-t, 3 cug:oq sde?rs%tj'? ir~zcpk~d. T1.e ~zfeiy
6+.;;.2 FAISL be CXSDJZT~ of g:rl~r,i~*c: steel wit12 a mini-
mcm *&chess cf .OlS. It shtauld jt rllz?ed 2s 51r.cx:n iq
Fipre 23.
S5o:~ld be at least 315" hicknmd meel lad Sui_lCi?~ cgde
requirements. Tlr. Wshd 11.iglr of tile 1!rlrr5 ex!m:nn
must not block rhe inlet st h:le Isonom of the %place.
Fi~re 40 show a sample of t!k we of kta%z?i~n
WWeJthTINQ: EEARTE EXTEUSJON MAY BE El-
STALLED OYLY AS ILLUSTRATED. FIGLxES 39
TmOUGH 43 SFEO'IY DPJOKLALWST-M~tATTTOh'S.