3 W+ a2 Q0 `, r! G* w8 u* Y5 w) M \* M; Z
For indoor air quality, CLT has been tested to determine the level 5 z- b! A* n7 ^( @and safety of the off gassing it produces. CLT glue lines were tested for9 U( [$ q5 D3 N: \1 v
volatile organic compounds (VOCs), including formaldehyde emissions.! @, I" @; Q6 d
The VOCs as measured in a series of tests were found to be roughly one7 |' A9 N ~+ u
parts per billion (ppb), well under the standard of 50 ppb deemed to be$ r4 J5 \" x6 `4 T9 ~6 P1 v
a health hazard.. }2 J1 a$ T( X7 f8 s: q# G' E* n& E
$ z* m# ]: @. S% b$ D: V3 P
source:% L9 J& G3 S c7 ^ CROSS-LAMINATED TIMBER IN BRITISH COLUMBIA0 d* C$ }) Y d: D5 E4 h4 L7 | http://www.naturallywood.com/sites/default/files/CLT-and-Dowling-Residence.pdf
石工 发表于 2016-6-2 15:29 3 Q) C- X" H# j3 uFor indoor air quality, CLT has been tested to determine the level / K5 Y' y! b6 r! i/ ?and safety of the off gassing i ...
, y! R/ F9 {- ?" x
CLT肯定是符合标准的,我只是对现行标准不大放心。treated wood在当年也是符合标准的。
7 p4 T$ v; H: A' \5 \( E
见过一个游泳池的房顶梁用这种材料做然后靠墙的部分全部腐烂了。好像是水蒸汽在棚顶凝结然后流倒最底初聚集,从而腐烂低处。。所以我看,这种材料不像他们所宣称的那样。不过到是看到很多新建的游泳馆都在用这种材料。估计以后会出大问题的,那天塌了死几个人,人们才会禁止使用这种材料在可能集水的地方。
石工 发表于 2016-6-3 05:29 7 b8 {/ i- H: t- s4 `For indoor air quality, CLT has been tested to determine the level; y+ N) o2 @# g: o
and safety of the off gassing i ...
% f* X/ n+ O' |& T& C7 z, S' P: P9 m1 T% V- c& [
60年代这边还很时兴喷聚尿醛泡沫,后来就是因为有formaldehyd释放而弃用了。