Directory Metric or Imperial
Home
 Home 		8 Inch Block
Calculator 		200 Series
Block Types 		200 Series
Calculator 		100 Series
Calculator 		Concrete Block
Miter Cuts
Calculator
Directory 		Block
Gable Cutting 		Templateless
Arch 		Circular
Block Walls 		Rebar
Map
Imperial Imperial Imperial Imperial

Build concrete filled masonry block arches without using a template See also: Masonry Arch Header Cut and Placement Calculator



An arch has 2 identical sets of cuts
(left and right sides). A bulls-eye (circle) has 4.

Scale
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.

Width
Height
Cut all the blocks before construction. The cut blocks (all halves) that form the arch are numbered sequentially, with off-cuts numbered identically. 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 metre long so the flashing doesn't get in your way.



Concrete block arch diagram


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 us.


DON'T BREATH THE DUST If you're cutting concrete, stone or ANYTHING and there's DUST - DON'T TAKE THE RISK
Don't cut it, or cut it wet so there's NO DUST - Silicosis Sucks

How should we spell it?



Results



Blue Dragon Childrens Foundation If you've benefited from this free service please consider supporting Blue Dragon Children's Foundation



Tell a Friend about this site!

Create PDF to print diagrams on this page. Help & Settings Printing Help Printing Help (new window)

Copy all diagrams on this page to bottom of page - Make multiple copies to Print or Compare.

View page on Phone via QR Code (Not current calculation result)

Contact Us (Australia) +61 7 40987645 m: 0438 165 753

If you've benefited from this free service please consider supporting
Please help us support Blue Dragon Children's Foundation


All calculators on this site are geometric only.
Check relevant local regulations for appropriate sizes, spacings and all engineering requirements.

Disclaimer   |   Privacy & Cookie Policy

Copyright © 2019 - blocklayer.com



To fine tune Slider Controls click to select then use ◄ ► keyboard cursor keys.


Directory

Help & Settings

Tell a Friend
about this site!

Share


↑ Remove This
Contact Us