Basic Info.
Application
Steel Structure Walkway, Foot Pedal, Drain Cover
Manufacturing Method
Machine Welding
Trademark
Quality Carbon Structural Steel
Transport Package
Standard Export Package
Product Description
FormationAs the drawing shows,HuiLian Grating formed by:
Bearing Bar,including Flat Bar,Serrated Flat Bar,I-Bar,Serrated I-Bar;
Cross Bar,usualli using twisted square bar,and round bar as well;
Banding Bar.
Description
The description of HuiLian Grating is as above shows,using unit mm to describe the main parameters of grating as below:
H:width of bearing bar,also shows the grating deph
T:thiskness of bearing bar
B:bearing bar spacing
C:cross bar spacing
I:optional,I-bar grating to be added,I-bar grating to be added,profile and parameters of I-bar see table right.
S:optional,serrated bar grating to be added
| I-Bar Name | H
(mm) | T
(mm) | t
(mm) | Theoretical Weight
(kg/m) | Resistance moment(W)
cm³ | Moment of inertia(J)
cm² |
| I-25×5×3 | 25 | 5 | 3 | 0.75 | 0.48 | 0.60 |
| I-32×5×3 | 32 | 5 | 3 | 0.97 | 0.78 | 1.25 |
| I-38×5×3 | 38 | 5 | 3 | 1.13 | 1.10 | 2.08 |
| I-44×5×3 | 44 | 5 | 3 | 1.30 | 1.46 | 3.22 |
| I-50×5×3 | 50 | 5 | 3 | 1.51 | 1.84 | 4.61 |
| I-50×7×4 | 50 | 7 | 4 | 1.98 | 2.57 | 6.43 |
| I-55×7×4 | 55 | 7 | 4 | 2.18 | 3.09 | 8.49 |
| I-60×7×4 | 60 | 7 | 4 | 2.39 | 3.72 | 11.22 |
| I-65×7×4 | 65 | 7 | 4 | 2.55 | 4.29 | 13.96 |
| I-75×7×4 | 75 | 7 | 4 | 2.96 | 5.70 | 21.39 |
Standard
| Country | Bar Grating Standard | Hot-dip Galvanizing |
| P.R.China | YB/T 4001.1-2007 | GB/T13912-2002 |
| U.S.America | ANSI NAAMM MBG 531-00 | ASTM A123 |
| U.K.British | BS 4592-1987 | EN ISO 1461-1999 |
| Australia | AS 1657-1985 | AS 1650 |
| Germany | DIN 24537-1991 | DIN 50930-3-1993 |
Tolerance
| (w) | Toler. of Panel Width | w max = ±5mm |
| (l) | Toler. of Panel Length | L≤2000mm 1 max = ±5mm
L>2000mm 1 max = ±3‰*L |
| (d) | Toler. of Panel diagonals | L≤2000mm d max = D1 - D2 = ±6mm
L>2000mm d max = D1 - D2 = ±3‰*L |
| (b) | Toler. of B.Bar Spacing | 10 Spacing b max = ±6mm
1 Spacing b max = ±1.5mm |
| (bb) | Tolerance of bow of bearing bars | bb max = 1/200*L |
| (c) | Toler. of C.Bar Spacing | 15 Spacing c max = ±6mm
1 Spacing c max = ±2mm |
| (cb) | Toler. of curing of cross bars | cc max = 4‰*W |
| (k) | Toler. of C.Bar beside B. Bar | k max = 2mm |
| (q) | Toler. of C.Bar Upon B.Bar | q max = 1mm |
(n)
(m) | Toler. of Banding Bar upon of beneath Bearing Bar | n/m max = 1.5mm |
| (g) | Toler. of Lean of B. Bar | g max = 0.1*H |
| (e) | Toler. of Longitudinal Staightness | e1 max = 1/150*L
e2 max = 1/200*L |
| (p) | Toler. of Transverse straightness | p max = 1/100*W |
How to Choose
The most frequently used HuiLian grating series are 20mm,30mm and 40mm bearing bar spacing.These series can satisfy to variant needs by the grating using circumstance.According to bearing bar shape, HuiLian grating can also be distinguished to Flat Bar Grating,Serrated Bar Grating,I-Bar Grating and Serrated I-Bar Grating.
To choose a proper type of grating,bearing bar spacting series should be decided first according to the grating using circumstance demand.For example, in a public area,20mm series should be chosen to avoid small object falling through; in most industry plant, 30mm series can satisfy almost all platform safety standard world wide; and if the platform is used only occasionally or gratings used to be fencing or elevation elements, 40mm series is an ecnonmical choice.
Then according to the maximum span of grating panels, using the corresponding Loading Table(see next page), the most economical bearing bar profile can be decided.SDG recommend the I-bar gratings, for its good loading capacity and less cost performance comparing to 3mm and 5mm thick bearing bars gratings.
In addition, besides serrated bar can provide better anti-slip performance, plain bar gratings has enough anti-slip capability from the twisted aquare cross bars for common using.Considering the loading capability reduction from bar serration, serrated bar gratings should be only chosen under extreme anti-ship demanding.
Address:
20F, Yuanda Building, 360changshou Road, Putuo, Shanghai
Business Type:
Trading Company
Business Range:
Construction & Decoration
Company Introduction:
Our company offers variety of products which can meet your multifarious demands. We adhere to the management principles of "quality first, customer first and credit-based" since the establishment of the company and always do our best to satisfy potential needs of our customers. Our company is sincerely willing to cooperate with enterprises from all over the world in order to realize a win-win situation since the trend of economic globalization has developed with anirresistible force.
