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PRODUCT
In
elctroforged process cross bars are press-locked into unweakened
bearing bars by way of high pressure and electrofusion. The process
is completely automated resulting in high productivity and better
quality.
Round or twisted bars are pressed and simultaneously resistance welded
into solid bearing bars obtaining perfectly homogeneous weld at every
intersection without any air gaps. Thus the grating panels have high
stability, maximum strength and optimum load distribution.
The scientific endeavor produced outstanding results in terms of quality, speed and resultant economy. This effectively replaced manually fabricated gratings. The 1/4" square twisted cross bars or bars as per customer requirement are welded or electro-forged to the rectangular shaped bearing bars by a process that combines intense hydraulic pressure with a powerful electric current. This results in strong, durable grating suitable for a wide range of application
Advantages
As done in Conventional Method bearing bars are not punched to accommodate cross bars. Full depth of bearing bars is effectively utilized thus making electroforged gratings stronger than conventional gratings made from same steel section.
Electrofusion eliminates weld defects such as porosity, undercut, blowholes etc. observed in manual welding. No slag is formed thereby giving better aesthetic value to the grating.
Automated process with elimination of punching and clearing gives high productivity. Delivery time is drastically reduced.
Difference betwee
Manually Fabricated Gratings Electroforged Gratings
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Construction is primitive and orthodox. Notches are punched along the bearing bars to allow cross bars to fit in. This weakens the bearing bars. Large air gaps lead to poor weld. Intersections are prone to rusting as they don’t lend to perfect painting surface finish. Moderate Strength Load bearing capacity - 25% less than electroforged gratings. Cutouts not as strong and stable as electroforged gratings. Handmade/ fabricated gratings are not very precise in dimensions. Because of arc welding, flux, which causes imperfect galvanizing leaves behind black spots.
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Construction is highly specific. Cross bars are pressed into solid bearing bars without any notches and as such the strength of bearing bars is not reduced. Every intersection weld is homogeneous and hence there are no air gaps. Homogeneous forged welds give : High strength to gratings. High load bearing capacity. Excellent stability (incomparable resistance to twisted and bending distortion. Cutouts have a high degree of strongness and stability. Accuracy of dimensions is far superior. This speeds up fixing operations of gratings. This means more cost effective. Perfectly non skid yet smooth walking surface as cross bars are fully pressed into the bearing bars. |
Finishing
Hot Dip Galvanized , Powder Coated, PVC Coated, Self Color, Red Oxide Primer, Other Paints Enamel, Epoxy etc. as specified.
Grating are mainly of two types :
1. Press locked gratings
2. Electroforged gratings
Stair Threads
Accessories
Metal Finish Description
Cross bars and bearing bars
The bearing bar steel is of two types which are produced in equivalent standard.
a ) Plain : The top surface is smooth & plain.
b) Serrated : The top surface is serrated for providing more anti slip Property.
Width : 25mm, 30mm, 32mm, 40mm
Thickness : 3mm, 5 mm, 6mm
Centre to Centre Bearing Bar Spacing :
This is the centre distance between two adducent bearing bar ,
Standard Size 30/ 33 / 41 mm
Cross Bar : The cross bar steel is of two types
a) Round
b) Square Twisted : Normally Square twisted bar is used because it provides anti skidding property.
Normally cross bar size is of 6mm.
Centre to Centre Cross bar spacing : Sizes are 50/100 mm
Width of Grating : It can be produced upto maxm. of 1.0 mtr. width
Length of Grating : Normally 6 mtr. Length.
Product Application
Gratings are Used in the following Industries :
Power Plants Oil Refinery Cement Plant Chemical Plnt Ship Building
Port Trusts Construction Sites Fertilizer Plants External fencing and Gates
Flooring and Stairtreads to walkways and stairways Other Industries
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