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Staircase Radius

The staircase radius is the measurement from the centre of the staircase to the outer edge of the handrail. Weland manufactures spiral staircases with a radius of 600 to

1500 mm.

Rise

The rise should be chosen based on the given height between the landings. A suitable radius and the number ofsteps per revolution then determine the step rise.

The rise should be sized between 160 and 220 mm. The lower the rise ou choose! the deeper the step needs tobe. The normal rise is about 1"0 to 1#0 mm.

The formula for the rise is 2 $ h % W & 5#0'6(0.

Right or left turning staircase

Weland spiral staircases are manufactured with right or left turning. )ight turning means turning to the right from

the entrance point. *the centre tube to the right of upward travel+.

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Right turning

Left turning

Headroom

The headroom on the stairs must not be less than 2000 mm. The height is measured between two points locateddirectl below each other.

,easure from the top edge of the lower step-s nose to the lower edge of the level-s *step+ rear edge.

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Number of steps per revolution

The figures to the right are a guide when determining the number of steps perrevolution and the number rises. ount the number of rises between the landingsand compare the values for the obtained rise.

/ields mared *green+ in the table are the staircase dimensions that should be aimedfor during the planning stage.

Radiussteps/rev.

Going on walkingline*

Suitablerise

6001(6001560016

15"1("1"

200'220200'220200'220

"0015"0016"001""001#

1##1""16615"

200'220200'220200'220200'220

#0016#001"#001##0013#0020

216201321#21"

1#0'2101#0'210130'220130'220130'220

300163001"3001#3001330020

30021

2552(022"21520(

13(

1"5'2001"5'2001"5'2001#0'2101#0'210

1#0'210

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10001610001"

10001#100013100020

10002110002210002

23(2""

2622(#26

22(21(205

165'1#5165'1#5

165'1#51"5'2001"5'200

1#0'2101#0'2101#0'210

11001#1100131100201100211100221100211002(

23"2#126"25(2(22222

165'1#0165'1#0165'1301"0'2001"0'2001"0'2001"0'200

12001"12001#120013

1200201200211200221200212002(

5111(

23#2#(2"12532(3

155'130155'130155'130

155'130155'130160'2001"0'2001"0'200

1001#100131002010021

1002210021002(

66("01(

002#"2"5

155'1#0155'1#0155'1#0155'1#0

155'130155'130155'130

1(00201(00211(00221(002

1(002(1(0025

1(0026

61((2#1(

012#3

2"#

150'1#0150'1#0155'130155'130

155'130155'130

155'13015002215002

15002(15002515002615002"15002#

5"(1

2"1(022312#0

150'1#0150'1#0

150'1#0155'1#0155'1#0155'1#0155'1#0

 

& 4taircase dimensions that should be aimed for.

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The going is calculated to be on an imaginar waling line 250 mm from thecircumference.

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http://www.weland.se/en-gb/spiraltrappa_industri_projektering/

http://www.arcat.com/details/divs/dd_div05.shtml

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