SP and P stair treads - EN

Stair treads made of resistance-welded gratings SP and press-locked gratings P

Stair treads are manufactured in accordance with DIN 24531-1 from both resistance-welded and press-locked gratings. For standard stair treads, load-bearing bars with dimensions 30 x 3 mm and 40 x 3 mm are used. A perforated anti-slip nosing edge is welded on the front side of the treads, which not only reduces the risk of slipping, but also increases the static load capacity of the tread and visually highlights its front edge. The treads are fitted with 3 mm thick side plates with holes for bolts. Standard tread dimensions are also supplied with an alternative side plate design – see images (more info in the attachment below). Tread dimensions and hole spacing in the side plate are shown in the following table.

Stair tread SP

left with alternative side plate design

Stair tread P

left with alternative side plate design

Standard dimensions of stair treads:

length L	+0	[mm]	width B	+5	[mm]	bearing bar [mm]	b [mm]	c [mm]	d [mm]	e [mm]	Permissible load [kN]	weight [kg/pc]
length L	-3	[mm]	width B	-5	[mm]	bearing bar [mm]	b [mm]	c [mm]	d [mm]	e [mm]	Permissible load [kN]	weight [kg/pc]
600			240			30×2	55	70	120	85	1,5	4,2
			270				55	70	150	85		4,6
			305				55	70	180	90		5,1
800			240				55	70	120	85		5,3
			270				55	70	150	85		5,9
			305				55	70	180	90		6,5
600			240			30×3	55	70	120	85		5,2
			270				55	70	150	85		5,8
			305				55	70	180	90		6,5
800			240				55	70	120	85		6,6
			270				55	70	150	85		7,5
			305				55	70	180	90		8,3
1000			240				55	70	120	85		8,2
			270				55	70	150	85		9,1
			305				55	70	180	90		10,2
1200			240			40×3	55	70	120	85		11,7
			270				55	70	150	85		13,2
			305				55	70	180	90		14,7

Other dimensions on request.

For fastening stair treads we supply:

Hexagon head bolts	M 12 x 35	ISO 4017 (DIN 933)
Hexagon nuts	M 12	ISO 4032 (DIN 934)
Washers (2 pcs)	M12	ISO 7089 (DIN 125A)

Installation of stair treads

During installation, it is necessary to verify whether there is too much clearance between the side plate of the stair tread and the stringer due to tolerances of these structures. If so, this clearance must be eliminated with spacer washers before bolting the stair treads to the stringers. This will prevent damage to the welds of the stair treads

Attachments

Standard stair treads with dimension table (*.pdf)