Before installing the ring ditch cover, it is essential to inspect the quality of the cover, particularly its strength class, to ensure it meets the design specifications. The cover should be free from cracks, chipped edges, honeycombing, pockmarks, and straight seams in the middle. A visual inspection and dimensional check are necessary to guarantee structural integrity and aesthetic appeal.
When it comes to installation, the top surface of the wall must be cleaned thoroughly and slightly moistened before applying mortar. Two key aspects need to be controlled: the elevation and the alignment of the drainage holes on the cover plates. Proper elevation ensures smooth water flow across the entire field, while aligned drainage holes contribute to the overall neatness and functionality of the system.
After placing the first cover plate, a second one should be installed every 10 meters as a reference for direction control. By using the central drainage hole of these two plates, a reference line can be created to guide the alignment of subsequent covers. If misalignment occurs, adjustments must be made carefully without shifting the centerline. This process involves a continuous cycle of positioning, adjusting, and verifying the centerline, ensuring that any deviation remains within acceptable limits.
The installation of the ring ditch primarily focuses on elevation and centerline accuracy, both of which directly impact the usability and appearance of the site. Additionally, the installation must be stable, with tight joints and fully filled mortar gaps. It's also important to clean the bottom of the trench during installation to maintain quality standards.
Here are the quality requirements for the installation of prefabricated reinforced concrete covers:
| Project | Allowable Deviation (mm) | Test Range | Number of Points | Testing Method |
|--------|--------------------------|------------|------------------|----------------|
| Centerline Offset | ≤5 | 10m | 1 | Measured with a string |
| Height Difference Between Adjacent Boards | 3 | 10m | 1 | Measured with a ruler |
| Plate Bottom Wall Length | ±10 | 10m | 1 | Measured with a ruler |
| Sheet Seam Filling Mortar | Full | 10m | 1 | Visual inspection |
Note: The strength grade of the prefabricated reinforced concrete cover must meet the design requirements. The surface should be free from cracks, chipping, or other defects to ensure long-term durability and performance.
Neon Letters
We are a factory direct outlet in A.D industry, more than 13 years experience.
Main produce advertising signs, such as lightbox, luminous letters, directory and Wayfinding Sign, aluminum profile sign,waste bin,mail/parcel drop box and some project sign.
Make it easily to our customer
Contact us →A reference picture or your design→Size information→Confirm the size and material→You will get our best offer.
FAQ
Q: Are you a trading company or factory?
A: We are factory.
Q: What is the MOQ?
A: No MOQ required normally, that means you can always ask for a sample first. But remember the sample freight is at your own cost.
Q: Do I have to have a design to inquire?
A: Yes! A well made design/artwork is the most helpful thing to get an exact quote. However, if you really do not have a design...just let us know your idea, we'll cover it.
Product name: Neon Letters
Marterial: Acrylic back plate+neon lights
Size: customize
Color: customize
Warranty: 1 year
Coffee Bar Lights,Decorative Neon Lights,Holiday Sign Letters,Colorful Neon Lights
Chengdu GodShape Sign Co., Ltd , https://www.signsgs.com