Electro Forged Gratings

About the Product

Gratings are assembled grids of parallel bearing bars with crossbars used to space and hold the bearing bar erect. The assembled grid is used to cover of floor any of various openings. Gratings provide a surface but allow air, light, heat, sound and water to pass through. It is strong and durable and maintenance-free.

Electro Forged Gratings are manufactured using Electro Forged machine with the flexibility and capacity of welding an extensive range of bearing bar of size from 25*3 mm up to 50*5 mm and crossbar size from 6 mm to 8 mm.

TECHNICAL SPECIFICATION OF ELECTRO FORGED GRATINGS

Standard Sizes

25x3, 25x5, 25x6, 30x5, 30x6 32x5, 40x5, 50x5mm Bearing Bars/Load Bearing Bars/Main Bars
The bars carry the load of the gratings and are usually:
30x3 mm 25 x 3 – light duty grates
25x5, 30x5 – medium duty grates
40x5, 50x5 – heavy duty grates

C/C or Mesh Size

This is determined according to the client’s use and load distribution demand

Cross Bars Mesh

50mm and 75mm
Flat bars are welded to bearing bars to keep the bearing bars spaced at a fixed distance.
Cross bars are usually :
6mm and 8mm – Sq Twisted Bar (Across the Diagonal)

Bearing Bars Mesh

25mm, 30mm, 35mm, 40mm, 41mm and 50mm

Technical Terminologies

Bearing Bars

Parallel bars bearing loads between supports

Frame Bar

Bars that are flushed at the end of the bearing bars and welded to the edges.

Cross Bars Pitch

Distance between the centres of cross bars (C/c)

Transverse Bars/Cross Bars

a) Round
b) Square-Twisted: Usually, square-twisted bars are used to provide an anti-skidding property. The Connecting Bars are welded for contact resistance of mild steel at different temperatures and different pressure. The contact resistance generally decreases with increasing temperature but has a local ridge around 3000C and it decreases almost proportionally with increasing pressure. The principal of resistance welding is the joules heating low where the heat Q is generated (Q=I2 Rt)

ADVANTAGES

Comparison of Electro forged Gratings over Handmade Gratings:

Handmade Gratings	Electro Forged Gratings
Manual labour is required	Automatic welding process
Cross-bar/bearing bar are welded manually and therefore, the welding is non-homogeneous	Bearing bars are welded by electro-fusion process and the welding is homogeneous
Production time is more	Production time is less
High labour cost	Labour cost is less
Work gets held up as there is no control over time because of breakage of dies or machines breaking or shortage of labour, which are inevitable in a makeshift arrangement	Total control over project schedule because of stock availability of gratings
Weight compared to Electro Forged Gratings more	Weight is less compared with Manual Gratings
Since bearing bars are punched to fit cross bars, strength gets reduced	Since bearing bars are not punched, strength is more