We collect these frequently asked questions and help customers further understand our company and products.

You can find more information on our web, so please take a look.

1. What standards do your steel gratings meet?
We are able to manufacture steel gratings in complaint with standards in different countries, such as YB/T.1-, ANSI/NAAMM (MBG531), BS and JJS Standards.

2. How do you control the quality of your gratings?
In order to get high quality, we introduce advanced production lines and inspection machines, strictly follow the manufacture requirements and gained countless certifications. 70% of our gratings are sold overseas, well demonstrating the superior product quality.

3. What specifications and types do you supply?
Jiulong has the manufacture ability to offer steel grating of any specifications or types. You only need to inform us your special requirements about dimensions, materials, color and anything you think we should know.

4. What’s your raw material?
Our raw materials include Q235 and A36carbon steel and stainless steel. Additionally, we can also use material that the customer appoints.

5. What’s the difference between plain grating and serrated grating?
The serrated grating possesses better anti-slip performance but higher price than plant grating, widely used in petrochemical engineering.

6. What’s the surface treatment?
The surface treatment includes hot-dip galvanization, painting, electrostatic coating or non-treatment.

Shunbo Steel Grating Product Page

7. What does length and width exactly refer to?
In a grating, the length means the length of bearing bar while width means the length of cross bar. When you place an order, please make the dimensions clear and avoid mistakes.

8. How do you calculate the area of each grating?
a. For regular shape grating, the area equals to length multiplied by width of grating, including the area of holes and notches.
b. For irregular shape grating, the area is that of the steel grating before cutting, instead of the area of irregular shape grating.

9. Why should we offer the structure drawing and detailed parameters of the work site?
This is a requirement for better servicing you. Based on your structure drawing and parameters, we design and offer a grating perfectly suits your work site and ensure no extra cutting while usage. It greatly simplifies the installation work and saves your time. What’s more, according to the information you offer, we can recommend you the best suitable grating, which will save you time and money. We can also avoid the confusion between length and width mentioned in Q7 and prevent unnecessary economic loss for you.

10. Do you accept rush orders?
If the order requires 30% of our raw materials, we will accept your rush order. We will use four pressure welding machines and assign three teams of workers. For hot galvanization, we have built a galvanized pool.

Home >> Products >> Bar Grating >> Types and Specifications

Specification List

Technical Reference About Our Steel Grating Products:
Quick Tips for your purchasing help:
I. Bearing Bar (Load Bar) can be two types: plain flat type and serrated type. So, please mention the bar type with your inquiry. Common bar size range (mm): 20 x 3 to 100 x 9.
II. Bearing Bar Pitch / Spacing (center to center): 12.5 to 100 mm normally. 30, 40, 60mm are recommended. American standard size is available
III. Cross Bar Pitch/Spacing (center to center): from18.5 to 101.6mm or custom size. 50, 100mm are recommended. American standard size is available.
IV. Spacing Types: We offer two spacing types: square or each pitch size, or rectangular spacing.
V. Steel Material: Q235 Steel or stainless steel grating.
VI. Surface Treatment: Three types available. Please advise if you need the finishing types of the Mild Steel grating: Untreated/ mill black, coated or Hot Dipped Galvanized. Also please note we offer two types of hot dipped zinc plating according to different standards: China standard: YB/T - or American Standard: ASTM A123.
VII. Please mention the application for the order grating products, whether it is used for platform structures, industrial flooring decks or stair treads, drainage covers or other uses. We supply steel gratings with a variety of loading capacities (light type or heavy loading) and can help choosing the right grating materials and design styles that may determine the loading of the finished grating panels ( whether the grating is open bar or dense mesh type ) accordingly.

Main standard grating products we offer with specifications for reference.

Our customers can also choose from our detail specification lists for our Steel Bar Grating Standard Products, as below, with Vertical Bar Spacing, Horizontal Bar Spacing and Supporting Steel Bar Sizes.

Specification of Common Standard Steel Bar Grating Series No Vertical
Bar
Spacing Horizontal
Bar
Spacing Specification of Supporting Flat Steel
Width X Thickness
(mm) (mm) 20× 3 25× 3 32× 3 40× 3 20× 5 25× 5 1 30 100 G203/ 30/ 100 G253/ 30/ 100 G323/ 30/ 100 G403/ 30/ 100 G205/ 30/ 100 G255/ 30/ 100 50 G203/ 30/ 50 G253/ 30/ 50 G323/ 30/ 50 G403/ 30/ 50 G205/ 30/ 50 G255/ 30/ 50 2 40 100 G203/ 40/ 100 G253/ 40/ 100 G323/ 40/ 100 G403/ 40/ 100 G205/ 40/ 100 G255/ 40/ 100 50 G203/ 40/ 50 G253/ 40/ 50 G323/ 40/ 50 G403/ 40/ 50 G205/ 40/ 50 G255/ 40/ 50 3 60 50 - G253/ 60/ 50 G323/ 60/ 50 G403/ 60/ 50 G205/ 60/ 50 G255/ 60/ 50 32 × 5 40× 5 45× 5 50× 5 55× 5 60× 5 4 30 100 G325/ 30/ 100 G405/ 30/ 100 G455/ 30/ 100 G500 / 30 / 100 G555/ 30/ 100 G605/ 30/ 100 50 G325/ 30/ 50 G405/ 30/ 50 G455/ 30/ 50 G500/ 30/ 50 G555/ 30/ 50 G605/ 30/ 50 5 40 100 G325/ 40/ 100 G405/ 40/ 100 G455/ 40/ 100 G500/ 40/ 100 G555/ 40/ 100 G605/ 40/ 100 50 G325/ 40/ 50 G405/ 40/ 50 G455/ 40/ 50 G500/ 40/ 50 G555/ 40/ 50 G605/ 40/ 50 6 60 50 G325/ 60/ 50 G405/ 60/ 50 G455/ 60/ 50 G500/ 60/ 50 G555/ 60/ 50 G605/ 60/ 50

FOR SIDEWALK LOADING

Contact us to discuss your requirements of bearing bar grating. Our experienced sales team can help you identify the options that best suit your needs.

A Type Grating Frame Load Bar Pitdn Width B C D E Angle 200 TGD-A200-25 300 25 315 30 L30X30X3 20 250 TGD-A250-25 350 25 365 30 L30X30X3 20 300 TGD-A300-25 400 25 415 30 L30X30X3 20 350 TGD-A350-25 450 25 465 30 L30X30X3 20 400 TGD-A400-25 500 25 515 30 L30X30X3 20 450 TGD-A400-25 550 25 565 30 L30X30X3 20 200 TGD-B200-25 992 300 25 315 30 L30X30X3 15 250 TGD-B250-25 992 350 25 365 30 L30X30X3 15 300 TGD-B300-25 992 400 25 415 30 L30X30X3 15 350 TGD-B350-25 992 450 25 465 30 L30X30X3 15 400 TGD-B400-25 992 500 25 515 30 L30X30X3 15 450 TGD-B450-25 992 550 25 565 30 L30X30X3 15