To: "'seaint(--nospam--at)seaint.org'" <seaint(--nospam--at)seaint.org>
Subject: RE: Seismic Zone For India
From: Harold Sprague <harold.sprague(--nospam--at)neenan.com>
Date: Thu, 27 May 1999 14:01:13 -0600
I have noted the responses that you have received to date, and would add the
following note. Be cautious in mixing codes, especially in wind. The
differences between extreme velocity measurements are marked. I have
reported this issue on this list in the past. India uses the WMO standard
which is a 10 minute mean. ASCE 7-93 and the UBC uses a fastest mile wind,
and the ASCE 7-95 uses a 3 second gust.
Making an improper assumption on wind can create huge errors in pressure
calculations. Most of coastal India and a large distance inland is subject
to typhoon wind loads. The Punjab area may have locally heavy winds due the
proximity to the mountains. A 100 mph wind would indicate a higher end wind
load even considering it a peak gust wind load.
The US Navy DM 2.02 puts New Deli at an 85 mph 3 second gust wind load using
a 25 year probability.
The Neenan Company
From: SONSUR2(--nospam--at)aol.com [mailto:SONSUR2(--nospam--at)aol.com]
Sent: Wednesday, May 26, 1999 10:49 AM
Subject: Seismic Zone For India
I am doing a project in Punjab India, I would like to know what is the
seismic zone for Punjab India is and what is the wind velocity?
My architect is telling me they use zone 4 for seismic and for and wind
velocity use 100 MPH, I have doubts about this factors.
If any body has some experience working in that part of country or have some
references, I would appreciate.