1. Indicate material of grating, size of load bar and the surface treatment method.
2. Select suitable type of grating according to load table  4-5.
3. Indicate requirements of banding and cut-put position.
4. Offer the size, quantity and direction (span direction, normally written at the back, followed with "LB ").
5. Where any large area of grating application is required, please provide the following information in the drawing for the purpose of layout design:
　※ All dimensions.
　※ Load bar direction, location and section size of support steel direction of V-iron.
　※ Location and size of movable area and cut-out.
　※ Location and size of' kick plate, front nosing and splicing.
6. The grating is generally priced by square meter according to area calculation standard of' YB/T4001.1-2007, i.e.max size of' exterior, including holes and cut-out. ect. Shown as the attachment 1.
7. Reasonable alignment of grating.
For example: When using G325/30/100-G grating on a 4700x1500mm platform, generally the design of load bar will be based on the short span(1500mm), moreover, some clearance should be left between gratings for installation. Grating layout on this platform is shown as figure below (See attachment 2).
Attachment l: ln accordance with YB/T4001.1-2007 standard, the area of following grating is calculated as follows: S=W x L