From Garaventapedia

X3-R Overhead Clearance Platform Folded Up

Stair Angle	15°	20°	25°	30°	35°	40°	45°
Dimension B - Platform Running Clearance
800 x 1050mm Platform (31 1/2" x 41 3/8")	1416	1509	1608	1717	1840	2011	2212
	55 3/4	55 1/2	63 3/8	67 3/8	72 3/8	79 3/16	87 1/8
800 x 900mm Platform (31 1/2" x 35 1/2")	1376	1454	1538	1630	1735	1886	2060
	54 3/16	57 1/4	60 5/8	64 3/16	68 3/8	74 1/4	81 1/8
700 x 750mm (27 1/2" x 29 1/2") Platform	1320	1378	1442	1513	1591	1682	1832
	52	54 1/4	56 3/4	59 5/8	62 5/8	66 1/4	72 1/4

X3-R Minimum Overhead Clearances to Meet US Code Requirements

Stair Angle	15°	20°	25°	30°	35°	40°	45°
Dimension D - US Code for Overhead Clearance (1524mm (60") above Platform)
800 x 1050 (31 1/2" x 41 3/8”) platform	1897	1998	2105	2222	2352	2499	2670
	74 3/4”	78 3/4”	82 7/8”	87 1/2"	92 5/8”	98 3/8"	105 1/8”
800 x 900mm (31 1/2" x 35 1/2") Platform	1857	1943	2035	2135	2246	2372	2519
	73 1/8’	76 1/2”	80 1/8”	84”	88 3/8”	93 3/8”	99 1/4”
700 x 750 (27 1/2" x 29 1/2") platform	1817	1888	1965	2048	2141	2246	2369
	71 1/2”	74 3/8”	77 3/8"	80 5/8”	84 1/4”	88 3/8"	93 1/4”

X3-R Minimum Overhead Clearances to Meet Canadian Code Requirements

Stair Angle	15°	20°	25°	30°	35°	40°	45°
Dimension E - Canadian Code for Overhead Clearance (1500mm (59") above Centerline of Platform)
800 x 1050 (31 1/2" x 41 3/8”) platform	1733	1783	1836	1895	1960	2034	2121
	68 1/4”	70 1/4”	72 1/4”	74 5/8”	77 1/8”	80 1/8”	83 1/2”
800 x 900 (31 1/2" x 35 1/2”) platform	1712	1755	1801	1851	1907	1970	2045
	67 3/8”	69 1/8”	70 7/8"	72 7/8’	75 1/8"	77 5/8”	80 1/2”
700 x 750 platform (27 1/2" x 29 1/2")	1692	1728	1766	1808	1854	1907	1970
	68 5/8”	68”	69 1/2”	71 1/4”	73”	75 1/8”	77 1/2"