Super-Wal extension framing arches (15” thick and made up of double 2” x 4” members) are placed 16” to 24” on center starting at the dome and continuing to the end wall of the extension. At that point, we use arches made up of 2”X8” pieces. These 2”x8” arches sit on top of the foundation extension “wing” walls and form the rain/snow canopy over the doors and windows. Arches are shipped pre-assembled in two sections due to size restrictions of the semi-trailer. Nails are provided for on-site joining of the two sections. The roof pitch is 4/12, allowing you to use shingles.

Extension Arches	Riser Height	Super-Wal 2 Story without Floor	2″ x 12″ 2 Story
Model 650 – 30′ High Profile	28″	$473	$544
Model 950 – 36′ High Profile	28″	$490	$564
Model 1250 – 40′ High Profile	28″	$525	$604
Model 1600 – 46′ Mid Profile	28″	$484	$557
Model 1800 – 49′ Mid Profile	28″	$490	$564
Model 2000 – 51′ Mid Profile	28″	$500	$575