Bar Grating


OPEN STEEL FLOOR GRATING

Smooth-surface grating          Serrated-surface grating

GRATING AVAILABLE IN CARBON , STEEL , ALUMINUM &  STAINLESS

Standard Mesh Types and Close Mesh Types

Bearing Bars WEIGHT IN LBS. PER SQ. FT.
Type 19-W-4 Type 19-W-2 Type 15-W-4 Type 15-W-2
3/4 x 1/8 4 4.6 4.8 5.5
3/4 x 3/16 5.6 6.3 6.9 7.5
1 x 1/8 5.1 5.7 6.2 6.9
1 x 3/16 7.3 8 9 9.6
1 1/4 x 1/8 6.1 6.8 7.5 8.2
1 1/4 x 3/16 8.9 9.6 11.1 11.7
1 1/2 x 1/8 7.3 7.9 9 9.6
1 1/2 x 3/16 10.6 11.2 13.1 13.8
1 3/4 x 3/16 12.2 12.9 15.2 15.8
2 x 3/16 13.9 14.5 17.3 17.9
2 1/4 x 3/16 15.4 16.1 19.2 19.9
2 1/2 x 3/16 17.1 17.7 21.3 22.0

Other Sizes Cut To Your Specifications
When ordering GRATING, specify:
Type of GRATING
Size of BEARING BARS (DEPTH & WIDTH)
Span (direction of bearing bars)
Dimensions of area
Painted or Galvanized, Smooth or Serrated

WELDED BAR GRATING

Standard Serrated

STAIRTREADS

Stairtreads come complete with a carrier plate each end and checker plate nosing to ensure maximum visibility.

END PLATE DETAIL

Sec_12_barsx_Safety_and_Fiberglass_Grating_Page_05_img_04
Tread WidthNumber of Bearing Bars“A” Dimension
6 3/16"52 1/2"
7 3/8"64 1/2"
8 9/16"74 1/2"
9 3/4"87"
10 15/16"97"
12 1/8"107"

RECOMMENDED BEARING BAR SIZES

Maximum Length of TreadBearing Bars Size
2'2"3/4" x 3/16"
3'0"1" x 3/16"
4'0"1 1/4" x 3/16"
5'3"1 1/2" x 3/16"

TYPICAL STAIR STRINGER DETAIL

BAR GRATING

W19-4

Stock mat – nominal 3’0″ x 24’0″

Bearing Bars 1/16″ centres   4″ centres twisted cross bars

IMPERIAL TABLE OF SAFE LOADS

U – Safe Uniform Load, in lbs. per sq.ft.
C – Safe Concentrated Load in lbs. per foot of grating width.
D – Deflection in inches.
Loads and deflections given in this table are theoretical and are based on a maximum allowable fibre stress of 18,000 P.S.I.

NOTE: Spans and loads to the right of the heavy line exceed a deflection of 1/4″ for uniform loads of 100 pounds per square foot. Experience has shown that 1/4″ deflection is the maximum deflection for perestrian comfort, but can be exceeded for other types of loads at the discretion of the engineer.
For serrated-surface, increase depth by one size.

Size of Bearing BarApprox. Weight per Square Foot2'-0"2'-6"3'-0"3'-6"4'-0"4'-6"5'-0"5'-6"6'-0"6'-6"7'-0"
3/4" x 1/8"3.93U–386–0.076247–0.119172–0.173126–0.23496–0.30876–0.389
3/4" x 3/16"5.58U–578–0.076370–0.119258–0.173188–0.234144–0.308115–0.389
1" x 1/8"5.03U–686–0.057439–0.09304–0.129224–0.176171–0.231135–0.293190–0.3691–0.43476–0.518
1" x 3/16"7.23U–1029–0.057659–0.09459–0.129338–0.176257–0.231203–0.293164–0.36135–0.434114–0.518
1 1/4" x 1/8"6.12U–1072–0.046686–0.072476–0.104350–0.141268–0.183212–0.233172–0.288142–0.349119–0.416101–0.48787–0.565
1 1/4" x 3/16"8.87U–1608–0.0461028–0.072716–0.104526–0.141403–0.183318–0.233258–0.288213–0.349179–0.416152–0.487131–0.565
1 1/2" x 1/8"7.23U–1544–0.038987–0.059686–0.087505–0.117387–0.154306–0.195248–0.241205–0.289172–0.347149–0.406128–0.47
1 1/2" x 3/16"10.51U–2321–0.0381485–0.0591031–0.087758–0.117581–0.154458–0.195371–0.241307–0.289260–0.347222–0.406191–0.47
1 3/4" x 3/16"12.17U–3151–0.0332016–0.0521401–0.0741029–0.101788–0.132622–0.167505–0.206416–0.249351–0.297299–0.347259–0.403
2" x 3/16"13.81U–4116–0.0292633–0.0451829–0.0641344–0.0881029–0.115813–0.145659–0.18546–0.217460–0.259393–0.303339–0.353
2 1/4" x 3/16"15.45U–5209–0.0263332–0.0392314–0.0571670–0.0791302–0.1021028–0.129835–0.16689–0.194583–0.23496–0.27428–0.314
2 1/2" x 3/16"17.11U–6432–0.0234115–0.0362858–0.0512099–0.0711609–0.0921291–0.1161029–0.144850–0.173720–0.207613–0.242529–0.282
Bearing bars 30mm centres 102 mm centres twisted cross bars

METRIC TABLE OF SAFE LOADS
W102-30

Stock mat – nominal 915 mm x 7315 mm
U – Safe Uniform Load, in KN per metre of width.
C – Safe Concentrated Load in lbs. per foot of grating width.
D – Deflection in mm.

Loads and deflections given in this table are theoretical and are based on a maximum allowable fibre stress of 124.0 Mpa

NOTE: Spans and loads to the right of the heavy line exceed a deflection of 1/4″ for uniform loads of 100 pounds per square foot. Experience has shown that 1/4″ deflection is the maximum deflection for pedestrian comfort, but can be exceeded for other types of loads at the discretion of the engineer.
For serrated surface, increase depth by one size.

SPAN IN MILLIMETRES

Size of Bearing BarApproximate Weight per Kg/m261076291510671219137215241676182919812133
19 x 3.219.2U–18.5–1.911.84–38.24–4.46.04–5.94.6–7.83.64–9.9
19 x 4.827.2U–27.7–1.917.73–312.36–4.49–5.96.9–7.85.51–9.9
25 x 3.224.6U–32.87–1.421.04–2.314.57–3.310.73–4.58.19–5.96.47–7.45.22–9.14.36–113.64–13.2
25 x 4.835.3U–49.31–1.431.58–2.321.99–3.316.2–4.512.31–5.99.73–7.47.86–9.16.47–115.46–13.2
32 x 3.229.9U–51.37–1.232.87–1.822.81–2.616.77–3.612.84–4.610.16–5.98.24–7.36.8–8.95.7–10.64.84–12.44.17–14.4
32 x 4.843.3U–77.05–1.249.26–1.834.31–2.625.2–3.619.31–4.615.24–5.912.36–7.310.21–8.98.58–10.67.28–12.46.28–14.4
38 x 3.235.3U–73.98–147.29–1.532.87–2.224.2–318.54–3.914.66–511.88–6.19.82–7.38.24–8.87.14–10.36.13–11.9
38 x 4.851.3U–111.2–171.16–1.549.4–2.236.32–327.84–3.921.95–517.78–6.114.71–7.312.46–8.810.64–10.39.15–11.9
45 x 4.859.4U–151–0.896.6–1.367.13–1.949.31–2.637.76–3.429.8–4.224.2–5.219.93–6.316.82–7.514.33–8.812.41–10.2
51 x 4.867.4U–197.2–0.7126.2–1.187.64–1.664.4–2.249.31–2.938.96–3.731.58–4.626.16–5.522.04–6.618.83–7.716.24–9
57 x 4.875.4U–249.6–0.7159.7–1110.9–1.480.02–262.39–2.649.26–3.340.01–4.133.01–4.927.94–5.823.77–6.920.51–8
64 x 4.883.5U–308.2–0.6197.2–0.9137–1.3100.6–1.877.1–2.361.86–2.949.31–3.740.73–4.434.5–5.329.37–6.125.35–7.2

NOTE: 1 KPa = 101.89 Kg/m2

WELDED BAR GRATING

CLEARANCES

LENGTH OR SPAN

WIDTH

The overall dimension of a flooring panel measured at right angles to the load bearing bars. This dimension is always referred to as “”width””, even if it exceeds the length. (Standard widths are multiples of BearingBar Centres plus Bearing Bar Width).

INSTALLATION

Saddle Clip Complete Assembly – consists of saddle

The overall dimension of a flooring panel is measured at right angles to the load bearing bars. This dimension is always referred to as “”width””, even if it exceeds the length. (Standard widths are multiples of Bearing Bar Centres plus Bearing Bar Width).

Saddle Clip Complete Assembly – consists of saddle clip, 5/16″ bolt, nut and bottom plate.

Field Welding – the most positive means of fastening grating to supporting members​

Saddle Clip Bottom Plate supplied with 5/16″ bolt​

Saddle Clip – for removable panels

Number of Bars234567891011
Standard W-191 3/8"2 9/16"3 3/4"4 15/16"6 1/8"7 5/16"8 1/2"9 3/4"10 7/8"12 1/16"
Number of Bars12131415161718192021
Standard W-1913 1/4"14 7/16"15 5/8"16 13/16"18"19 3/16"20 3/8"21 9/16"22 3/4"23 15/16"
Number of Bars22232425262728293031
Standard W-1925 1/8"26 5/16"27 1/2"28 11/16"29 7/8"31 1/16"32 1/4"33 7/16"34 5/8"35 13/16"