Graphical Construction Glossary >> masonry. >> arch >> Drop Arch

Drop Arch
A Gothic or pointed arch with the radii of the arcs less than the span.

a drop arch setting out

One again the radii are the same length and the arc centres are on the springing line but in this type of arch they are less than the span of the arch.

drop arch to the  intrados

Now here is a case of a stonemason or a builder showing his expertise. Clearly the arch intrados is a pointed arch although only just, but the extrados is in the shape of a moorish arch. Below that again we have a segmental arch. Seen in Florence.

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Adam Smith 1723-1790

"When we build, let us think that we build for ever."John Ruskin 1819-1900

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Please Note! The information on this site is offered as a guide only!  When we are talking about areas where building regulations or safety regulations could exist,the information here could be wrong for your area.  It could be out of date!  Regulations breed faster than rabbits!
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