Our staircase detailed dimension:

Please kindly send us the dimensions of staircase or the project drawing
Component	Specification	Material	Finish
Straight stair beam	Cebter square beam 100*200*6/100*150*5mm	Carbon steel Stainless steel	Hot dip galvanizing powder coated Brushed/Polished
	Double beam with U channel 300*6+300*6/300*5+300*5mm
	Double sawtooth stringer 300*12/300*10mm
	Double plate beam 300*12/300*10mm
Spiral stair beam	76*4mm center post 102*4mm column 150*10mm beam cover
Curved stair beam	Double plate beam 300*12/300*10mm
	Double beam with u channel 300*6+300*6/300*5+300*5mm
Staircase Tread	Solid wooden tread: 30mm/38mm/50mm/80mm	Oak,teak,walnut, beech wood	Painting
	Glass Tread: 10+1.52+10mm/12+1.52+12mm	Laminated glass	Clear/Frosted