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Drawings of Old Steel Bridges

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Hello everyone,

I have a set of drwaings and details of an old steel bridge. Next to
designation of a channel used for bracing, there is a notation "3R". Can
someone explain to me what it means. For example: 13C13.8# 3R

Many thanks in advance,

Majid Sarraf
Civil Engineering
University of Ottawa



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                  |                                          |
                   \               Majid Sarraf             /
                    \             Ph.D Candidate           /
                     \   Department of Civil Engineering  /
                      |        University of Ottawa      |
                      |           Ottawa, Ontario        |
                      |            Canada K1N 6N5        |
                      |   Tel:(613) 562-5800 Ext. 6159   |
                      |         Fax:(613) 562-5173       |
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