Spiral Stairway Steps

all steps in stock are designed for 5 kN/m² evenly distributed loads and 1.5 kN over 200 x 200 mm individual load. The spiral stairway steps in stock are available with a radius of 800 mm, 900 mm, 1,000 mm und 1,200 mm. Custom designs are available on request.

Spiral stairway steps are available in two basic designs:

Spiral stairway steps with a welded-on riser tube for mounting on a stair center pole

The perforation runs parallel to the stepping edge. The step pins and bolts are also supplied. The front edges are welded.

Notice: When ordering, please indicate the slope "S" and pitch and also whether a left-turn or right-turn spiral stairway is desired.

Spiral staiway steps with an accurately fitting cut-out for welding onto a center pole or riser tube

The perforation runs parallel to the stepping edge. The corners of the step components are not welded. These weld-on spiral stairway steps are made of raw steel.

Notice: When ordering, please indicate the pitch and whether a left-turn or right-turn spiral stairway is desired.

Stairway Radius	Usable Tread Width	Steps per Full Turn	Tread
800	707 707 707	14 15 16	258 241 226
900	805 805	15 16	270 253
1000	889 889 889 889	14 15 16 18	322 301 282 251
1200	1098 1098 1098	18 20 22	300 270 240

Material	Stairway Radius R in mm	tube ø D in mm outside	tube ø D in mm inside	outside Ø center pole Z in mm	Steps/ Full Turn Number n
DD 11 raw, hot-dip galvanized, 2.5 mm	800	127.0	117.0	114.3	14,15,16
DD 11 raw, hot-dip galvanized, 2.5 mm	900	127.0	117.0	114.3	15,16
DD 11 raw, hot-dip galvanized, 2.5 mm	1.000	152.4	142.4	139.7	14,15,16,18
DD 11 raw, hot-dip galvanized, 2.5 mm	1.200	152.4	142.4	139.7	18,20,22