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RE: Class A Loading Highway Bridges[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: <seaint(--nospam--at)seaint.org>
- Subject: RE: Class A Loading Highway Bridges
- From: "Shiraz Shahid" <sshahid(--nospam--at)engineering-solutions.biz>
- Date: Thu, 22 Oct 2009 16:05:30 +0600
- Disposition-notification-to: "Shiraz Shahid" <sshahid(--nospam--at)engineering-solutions.biz>
Thank you for a quick response.
Actually I want to determine the origin of this loading, it looks does not look like a notional vehicle but such truck-trains are not seen at least in Pakistan nor are there in US truck database (somebody please confirm my assumption), and how was this load developed, and whether its use is justified in present times.
Comparing it with current loads of various codes there are a lot of differences like there is no UDL along this load, a series of such vehicles is taken @ 20m intervals etc.
Yes u r right its taken from Indian IRC Codes. You can download the Indian code or otherwise u can get in touch with me.
Chief Engineering Manager
CMPC - EDRC - Kolkata
DLF IT Park, Premises # 8 | Block AF, 2nd Floor, Tower C
New Town, Rajarhat
(I sent this message before but I don’t know why it didn’t appear on the server!)
I am doing a study on truck loads for Pakistan and am trying to locate the origin of a “class A loading” for a highway bridge. This class A was introduced in Pakistan’s code of practice in 1967 and has remained there till date. Does anybody know where this load originates from? I searched the AASHTO history of loads and it is not there at least. Was it there in BS? The same load is also there in the latest revision of Indian Road congress IRC6 (rev. 2000) followed in India.
Class A is a truck-train loading with a four axle truck with two two-axle trailers. The truck-train weighs 122 kips (543 kN) in total and is 62 ft (18.9m) long. If you want to see a sketch of the truck-train, send me an email directly.
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