stair tread

stair tread, steel grating,, Galvanized bar grating,, flooring grating, stair tread, trench cover, ISO9001-2000,GRATING SPECI - details see: https://www.buildingsupplieshub.com/stair-tread-10093329
Type: Stair PartsPlace of Origin: Jiangsu China (Mainland)Brand Name: OterStair Part Material: Iron
color: sliverappearance: aestheticsense: modernventilation: good
safety: anti-skidinstallation: easysever life: durableclean: easy
property: Good rust-proofmaintenance: maintenance-free  
stair tread
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Stair Tread

Structure of Stair

Without Checkered Plate Nosing. (OTT1 or OTT2)With Checkered Plate Nosing(OTT3 or OTT4)
Type of Stair TreadsCheckered Plate NosingStructure Characteristics
OTT1NoFor installation by welding, the two ends are closed with flat bars which are the same with the bearing bars in length. Without checkered plate nosing.
OTT2NoFor anchoring with bolts, the two ends are closed with 65 x 5 mm flat bars with holes. Without checkered plate nosing.
OTT3YesFor installation by welding, the two ends are closed with flat bars which are the same with the bearing bars in length. With checkered plate nosing.
OTT4YesFor anchoring with bolts, the two ends are closed with 65 x 5 mm flat bars with holes. With checkered plate nosing.

Width of Stair Tread (mm)

Structure of StairSeries

Width (including the front protecting plate)

OTT1

OTT2

OTT3

OTT4

1125155185215245275305
OTT1

OTT2

2125165—205245285325
OTT3

OTT4

2115155—195235275315
OTT1

OTT2

3——185—245—305
OTT3

OTT4

4—155—215—275—

Recommended Length of Stair Tread (mm)

Max. Length

Section Area of Flat Bar25×325×532×540×5
Series 155090013001600
Series 245075012001500
Series 3—5508501350

Anchoring with Blots (OTT2 and OTT4) (mm)

Center Distance for “A” Holes457575100100150150

Protecting Plate

Protecting plate size is 65 x 5 mm, chamfered only when it needs so that it suits the inclined beam of stair.

Tolerance

Welding Standard of Stair Tread

Each bearing bar is single-side welded to two end flat bars with fillet weld of a 3-mm-minmum clearance.

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