Oak Spiral Stair Kit Dimensions

Diameter	Minimum Finished Opening	Clear Walk Space Between Pole and Rail	Square Landing Size	Degree of Tread Rotation	Center Hub Diameter	Base Plate Diameter	Standard Handrail Width
4'0"	4'-2" x 4'-2"	1'-7 1/2"	2'-1" x 2'-1"	30°	5 3/4"	12"	1 5/8"
4'6"	4'-8" x 4'-8"	1'-10 1/2"	2'-4" x 2'-4"	30°	5 3/4"	12"	1 5/8"
5'0"	5'-2" x 5'-2"	2'-1 1/2"	2'-7" x 2'-7"	30°	5 3/4"	12"	1 5/8"
5'5"	5'-8" x 5'-8"	2'-3 3/4"	2'-10" x 2'-10"	30°	6 1/2"	12"	1 5/8"
6'0"	6'-2" x 6'-2"	2'-6 3/4"	3'-1" x 3'-1"	30°	6 1/2"	12"	1 5/8"