Late Roman Army Shield Dimensions

[Salvianus]

I take it the ywere not using the layered strip method of construction any more?

Now that I wouldn't say. There were certainly some old school plywood sub-rectangular shields at Dura as well as the more numerous planked oval ones. As you can see from
<!-- l <a class="postlink-local" href="http://www.romanarmytalk.com/rat/viewtopic.php?f=17&t=8150&p=68098&hilit=shield+planked#p68098">viewtopic.php?f=17&t=8150&p=68098&hilit=shield+planked#p68098<!-- l
even the planked ones may have been bonded with additional fibres overlayed, but I don't have the James to find more. I think you can see from the diptych of Stillicho that at least some oval shields were rounded in at least the horizontal plane. If you haven't seen it,
<!-- l <a class="postlink-local" href="http://www.romanarmytalk.com/rat/viewtopic.php?f=20&t=6227&p=52069&hilit=shield+planked#p52069">viewtopic.php?f=20&t=6227&p=52069&hilit=shield+planked#p52069<!-- l
might be of interest.

I have two flat oval plywood scuta myself.

Fectio's flat oval plywood construction guide is:

http://www.fectio.org.uk/articles/makescutum.htm

Hope thats useful