Help please
There is a building construction trend in New Zealand to use CLT timber rather 
than typical concrete and steel.
We have done sprinkler designs for quite a few CLT buildings now, but we have 
our first one which requires the diesel engine exhaust to penetrate the timber 
wall.  A relatively small engine - Lister Petter LPWT4.

Our standard requires a sleeve design so that the surface of combustible 
material shall not exceed 70°C. (158° F)
The exhaust pipe is 60mm (2.4”)
I am aware of the design in NFPA 211, but looking for something more practical 
than a 460-660mm (18-26”) hole through the wall.
Can anyone help/point me in the direction of someone who can assist with this?

Thanks in advance.

Kind regards

[cid:[email protected]]Nicky Marshall
Southern Regional Manager

PROTECH DESIGN LIMITED
Specialist Fire Protection Consultants
Mobile Phone: +64 (0)21 433 488  Email: 
[email protected]<mailto:[email protected]>  Web: 
www.protechdesign.co.nz<http://www.protechdesign.co.nz/>
Address:105A Alabama Rd, Redwoodtown, Blenheim 7201, NZ
[cid:[email protected]]
“I always wondered why somebody doesn't do something about that. Then I 
realised I was somebody” Lily Tomlin

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