Lintel Arch Centres - Type AC

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A PVC-u arch unit for use over openings in external cavity walls – traditional and timber frame – providing permanent centring for brick arch construction.

Allows easy construction of segmental arches. Includes integral weep vent.

Material

Extruded from PVC-u for greater UV stability Catnic Lintel Arch Centres are designed to weather in accordance with the PVC-u windows. The design incorporates built-in weep vents for discharging the wind-driven rain that penetrates the external skin of a cavity wall.

Installation notes

i) Do not use damaged Arch Centres.

ii) Remove the Arch Centre from its protective wrapping.

iii) Check that the Arch Centre is correct for application (refer to the lintel specification).

iv) Ensure the Arch Centre and lintel mounting surfaces are clean and dry.

v) Locate the unit centrally over the opening to determine the position on the lintel. The front drip section should be trimmed off at the bearing end to allow for thin mortar joints and to enhance the appearance.

vi) Locate the unit on the lintel at position previously determined, ensuring a tight fit to the edge of lintel toe.

Arch Centre Code Arch Centre Span (mm) Rise (mm) Opening Sizes (mm)
Min Max
ACA0475 450 75 450 500
ACA0625 600 75 600 650
ACA0675 650 75 650 700
ACA0875 850 75 850 900
ACA0925 900 75 900 950
ACA1075 1050 75 1050 1100
ACA1225 1200 75 1200 1250
ACA1375 1350 75 1350 1400
ACA1475 1450 75 1450 1500
ACA1625 1600 75 1600 1650
ACA1775 1750 75 1750 1800
ACA2125 2100 75 2100 2150
ACA2325 2300 75 2300 2350
ACA2425 2400 75 2400 2450

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