1Proposed revisions to the requirements  of incombustibility testing methods 
for regulated incombustible interior building materials  
By the Bureau of Standards, Metrology and Inspection (BSMI), Ministry of Economic Affairs 
 
 
Background: 
Over the past years, CNS 6532 (Method of test fo r incombustibility of interior finish material 
of buildings) has been the only recognized lega l testing method for assuring the compliance of 
the incombustibility of the regulated incombus tible interior building materials. However, 
many studies reveal that Cone calorimeter testing method also provides a credible means to 
measure the heat release rate during combustion of a building ma terial and has become widely 
used by more and more countries. Having recogn ized this internationa l trend, the BSMI is 
planning to include CNS 14705, which is primaril y based on ISO 5660-1 Rate of heat release 
from building products (Cone calorimeter test method), as an alternative legal 
incombustibility testing methods for regulated incombustible interior building materials. 
 
 
Proposed date of implementation:   
‧1 September 2009 
 
Products (HS/CCCN codes) covered: 
HS/CCCN 4412.31.10.00.5 Other unfinished plywood (other than bamboo veneer), 
with at least one outer ply of tropical wood specified in 
Subheading Note 1 to this Chapter, each ply not exceeding 6 mm thickness (inspection scope: fire-retardant plywood) 
HS/CCCN 4412.31.20.00.3 Other processed plywoo d (other than bamboo veneer), 
with at least one outer ply of tropical wood specified in 
Subheading Note 1 to this Chapter, each ply not exceeding 6 mm thickness (inspection scope: fire-retardant plywood) 
HS/CCCN 4412.10.91.00.2  Other unfinished plyw ood, veneered panels and similar 
laminated wood, with at least one ply of bamboo 
(inspection scope: fire-retardant plywood) 
HS/CCCN 4412.32.10.00.4  Other unfinished plywood (other than bamboo veneer), 
with at least one outer ply of non-coniferous wood, each ply not exceeding 6 mm thic kness (inspection scope: 
fire-retardant plywood) 
HS/CCCN 4412.10.92.00.1  Other processed plywoo d, veneered panels and similar 
laminated wood, with at least one ply of bamboo (inspection scope: fire-retardant plywood)  
HS/CCCN 4412.32.20.00.2  Other finished plywood (o ther than bamboo veneer ), with 
at least one outer ply of non- coniferous wood, each ply not 
exceeding 6 mm thickness (inspection scope: fire-retardant plywood) 
HS/CCCN 4412.39.10.00.7  Other unfinished plywood (other than bamboo veneer), 
with both outer plies of c oniferous wood, each ply not 
exceeding 6 mm thickness (inspection scope: fire-retardant  2plywood) 
HS/CCCN 4412.39.20.00.5  Other processed plywoo d (other than bamboo veneer), 
with both outer plies of c oniferous wood, each ply not 
exceeding 6 mm thickness (inspection scope: fire-retardant 
plywood) 
HS/CCCN 4412.99.51.00.4  Other unfinished plyw ood, veneered panels and similar 
laminated wood, with at l east one outer ply of non- 
coniferous wood (inspecti on scope: fi re-retardant 
plywood) 
HS/CCCN 4412.99.52.00.3  Other processed plywoo d, veneered panels and similar 
laminated wood, with at l east one outer ply of non- 
coniferous wood (inspecti on scope: fi re-retardant 
plywood) 
HS/CCCN 4412.99.40.00.8  Other plywood, veneered  panels and similar laminated 
wood, with at least one outer  ply of non-coniferous wood, 
containing at least one layer of  particle board (inspection 
scope: fire-retardant plywood) 
HS/CCCN 4412.94.21.00.6  Other unfinished blockb oard, laminboard and battenboard, 
with at least one outer ply of non- coniferous wood 
(inspection scope: fire-retardant plywood) 
HS/CCCN 4412.94.22.00.5  Other processed blockb oard, laminboard and battenboard, 
with at least one outer ply of non- coniferous wood (inspection scope: fire-retardant plywood) 
HS/CCCN 4412.99.32.00.8  Other plywood, veneered  panels and similar laminated 
wood, with both outer plies of  coniferous wood, containing 
at least one layer of partic le board (inspection scope: 
fire-retardant plywood) 
HS/CCCN 4412.10.12.00.8  Plywood, veneered panels and similar laminated wood, 
with both outer plies of c oniferous wood, containing at 
least one ply of bamboo and at least one layer of particle 
board (inspection scope:  fire-retardant plywood) 
HS/CCCN 4412.94.11.00.8  Unfinished blockboar d, laminboard and battenboard, with 
both outer plies of conifer ous wood (inspection scope: 
fire-retardant plywood) 
HS/CCCN 4412.10.11.00.9  Plywood, veneered panels and similar laminated wood, 
with both outer plies of c oniferous wood, containing at 
least one ply of bamboo and not containing any layer of 
particle board (inspection scope: fire-retardant plywood) 
HS/CCCN 4412.99.31.00.9  Other plywood, veneered  panels and similar laminated 
wood, with both outer plies of coniferous wood, not containing any layer of partic le board (inspection scope: 
fire-retardant plywood) 
HS/CCCN 4412.94.12.00.7  Processed blockboard, laminboard and battenboard, with 
both outer plies of conifer ous wood (inspection scope: 
fire-retardant plywood) 
HS/CCCN 6811.82.00.00.8  Other sheets, panels, tile s and similar articles of cellulose 
fibre-cement or the like (inspection scope: Perlite Boards, Slag gypsum boards, Magnesium oxide boards, Fiber  3cement boards, Calcium silicate boards) 
HS/CCCN 6806.90.00.00.5  Articles of heat-i nsulating sound-insulating or 
sound-absorbing mineral materials, other than those of 
heading No. 68.11 or 68.12 or of Chapter 69 (inspection 
scope: Dressed rockwool boards for acoustic use, Rock wool sheathing boards) 
HS/CCCN 6809.11.00.00.8  Boards, sheets, panels, t iles and similar articles, of plaster 
or of compositions based on plaster, faced or reinforced 
with paper or paperboard only, not ornamented (inspection 
scope: Gypsum boards) 
HS/CCCN 6808.00.00.00.2  Panels, boards, tiles, blocks and similar articles of 
vegetable fibre, of straw or of  shavings, chips, particles, 
sawdust or other waste, of wood, agglomerated with 
cement, plaster or other mineral binders (inspection scope: 
Wood-cement particleboards, wood-wool cement boards) 
 
Inspection standards:  
CNS 6532  Method of test for incombustibility of  interior finish material of buildings 
CNS 14705  Method of test for heat release rate for buildi ng materials (Cone calorimeter 
test method) 
  
Proposed Requirements:  
1. Current situations: The onl y legal incombustibility te sting method for regulated 
incombustible interior building materials is CNS 6532. 
 2. Proposed revision: From September 1, 2009, CNS 14075 will become an acceptable legal 
incombustibility testing method for regulated incombustible interior building materials. 
The obligatory inspection appli cant may choose one of the testing method before applying 
for inspection. 
 3. Heat release rate for CNS 14705 is 8
MJ/m P2
P.