Graphical Construction Glossary >> Doors. >> Door Features >> Astragal
What we are looking at here is the bottom part of a pair of wooden framed double doors. It is easy to see that the meeting stiles of the doors appear to be two different widths. They are not, it is the effect caused when the two stiles are rebated together as shown below.
In this sketch I have shown three different treatments for these joints in timber doors. A plain rebate gives the effect that you can see in the top photo of unequal width door stiles, so to counteract this we sometimes put a small beading to the edges of the doors. Typically these rebates were the same depth as the rebates in the door frames, say 12mm or 1/2". They are there for the same reason also.
Here is a pair of doors that have the beading to the edge. If the doors were fitted a touch better, with a tighter joint the from a distance the two stiles would appear the be the same width.
The term astragal in architectural terms means a type of decorative moulding in timber of masonry, but it is also associated with hardware for double doors. As you can see it is far easier to make a sealed joint to a pair of doors by just screwing on one of these extrusions.
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