Calculators - Estimators - Template Generators - Plans & Tools

Tell a Friend Tell a Friend

Build concrete filled masonry block arches without using a template

How it works When the wall is core filled, the membrane (flashing) around the arch line stops the concrete. Remove off-cuts and extra blocks to reveal the arch.

Cut all the blocks before construction. The cut blocks (all halves) that form the arch are numbered sequentially, with off-cuts numbered identically.
Width
Height


Take the opening to spring height, then using a standard horizontal head support, go across the head, laying each cut in its place, its matching off-cut on top, with a membrane (aluminium flashing is ideal) between the two. Lay the cut, place the flashing on top of the cut line and lay the off-cut to lock membrane in place.
Use overlapping lengths of thick, strong aluminium flashing about 1 meter long so the flashing doesn't get in your way.
An arch has 2 identical sets of cuts (left and right sides). A bulls-eye (circle) has 4.
See also: Circular Paving Calculator for Custom Cut Stone Arches

Scale
Remove off-cuts and extra few blocks to reveal arch Remove off-cuts and extra few blocks to reveal bulls eye Round and curved top walls





Circular Raking Walls with Arch or Bullseye You can combine this Templateless Arch System with the Circular Wall System to easily build curved or circular (and raking) walls with arches or bulls-eyes. It's easy! If you'd like more detailed info on this, please contact me (below).



Slider Controls To fine tune Slider Controls click to select and use (cursor) keyboard keys.

Open new window containing only diagram images in current page ↓ This will better fit printed page. Printing to Scale Help
Print all diagrams on current page

Use your iPad or Android Tablet On-Site Your iPad, iPhone or Android Tablet or Phone is a valuable On-Site tool!
Lay your phone or tablet on an angled surface (roof ?) to directly measure angles and automatically calculate Roofing and Pitch Angle Apps.

If you've benefited from this free service, please consider a small donation to
Blue Dragon Children's Foundation


Tell a Friend! Calculator How To Videos Blocklaying Videos Site Map


Contact Us

Greg Tarrant - blocklayer.com - ph: (Australia) +61 7 40987645 - mob: 0438 165 753

Please help promote this site - Tell a Friend

Questions or Suggestions? ph: +61 7 40987645

ALWAYS CHECK WITH YOUR LOCAL BUILDING AUTHORITY BEFORE LAYING OUT OR BUILDING ANYTHING
AND FOLLOW ALL LOCAL CODES. VERIFY ALL DIMENSIONS AND ANGLES BEFORE CONSTRUCTION


Disclaimer | Privacy

Sitemap

Copyright © Greg Tarrant