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Fig. 4Non-combustibleble Only Front Wall Zone
Please note that the dimensions given are minimum, and we recommend using a slightly larger distance to
the combustible or the size of the floor protector.
3.5 Reducing Clearances
The clearances to combustible specified in section 3.3 of this manual, can be safely reduced by following
guidelines specified in AS/NZS 2918:2001 table 3.1 & 3.2.
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Heatshield should be made of non-combustible material like metal
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Installed between the fascia and the mantel shelf or mantle shelf column
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With an air gap behind it and vented top and bottom
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The shield for the mantle shelf should extend a minimum of 100mm beyond the width of the fascia
and protrude 10~15mm off the depth of the mantle shelf.
Clearance factors for heat shield which is within 45 degrees of the vertical
Heat Shield Construction
Minimum Air Gap Dimension
Clearance Factor
Single-layer of continuous material
12mm
0.4
Single-layer of continuous material
25mm
0.3
Two spaced layers of continuous material
12mm+12mm
0.2
Clearance factors for heat shield which is more than 45 degrees off the vertical
Heat Shield Construction
Minimum Air Gap Dimension
Clearance Factor
Single-layer of continuous material
12mm
0.8
Single-layer of continuous material
25mm
0.6
Содержание RANGITATA ULEB
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