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Re: pal system

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BC Building Corporation had the Pall system put in a major building in one of their Victoria BC buildings and are satisfied.  They were able to reduce the building cost due to the mitigation of foundation requirements for normal design.

I will post Dr Pall's contact later today or tomorrow as well as the BC Buildings Corp contact for their referral.  It is a "simple" system but case specific in its utility.  Normally you would provide them with your design and they "re-design" on the parameters required by their system.

Thor A. Tandy   P.Eng,  MCSCE,  MIPENZ
Victoria, BC, Canada
e-mail: <vicpeng(--nospam--at)>

-----Original Message-----
From: Dave Handy <dhandy(--nospam--at)>
To: SEAINT SERVER (E-mail) <seaint(--nospam--at)>
Date: Tuesday, September 08, 1998 2:54 PM
Subject: pal system

Has anyone used and/or heard of a system of steel cross bracing referred to as PAL bracing. It is some kind of system utilizing damping.

We are in zone 2 and have not had to use anything too unique for EQ loads. This type of thing (damping) is likely used more in the zones 3 and 4 for larger structures.

If one uses damping for a structure does it require that a dynamic analysis be done?  I am used to calculating a V and M from statics, codes, etc. I have taken a structural dynamics masters course but have not used much of it. (Good for background knowledge though). Are these damping systems proprietary or do engineers reinvent the wheel often?

Just wondering....
David Handy, P.Eng