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Re: AASHTO Loadings

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Thanks for the responses.

Thor A. Tandy P.Eng
Victoria BC
email: vicpeng(--nospam--at)
----- Original Message -----
Sent: October 8, 2004 4:54 AM
Subject: RE: AASHTO Loadings

Thor -
The AASHTO MS-18 truck is the metric version of the standard HS20 truck.
The loads and axle spacings are
Front Axle:  35,000 N
Center Axle:  145000 N
Rear Axle 145000 N
Front Axle to Center Axle distance:  4300 mm
Center Axle to Rear Axle distance:   variable from 4300 mm to 9000 mm ( to produce maximum stress),
(even though the short axle spacing almost always controls.
Hope this helps.
If you need it, the AASHTO MS-23 truck is the metric version of HS25, simply increase the above loads
by 25%, but keep the same axle spacing.

Daniel Mayo