Enter span, arch depth on face, preferred joint size and intrados rise required as a percentage of span (recommended 1%) and the calculator will provide all the detail to set out brick cut size at intrados and extrados (extrados brick cuts will be a constant measurment). Bricks at intrados with a >1% rise will be tapered and increase in size from skewback to key brick, and mirrored on opposite side. Click here to return to BTTB Calculation Tool Menu click on image to access
