READING NOTES
Understanding the mattress system
Reno mattresses are typically made from double-twisted hexagonal steel wire mesh. Internal diaphragms divide each unit into compartments, which are filled with stone on site to create a relatively thin protective structure. They can be used in erosion protection works along riverbanks and channels. Buying mesh units alone, however, does not complete the protection system. Before installation, coordinate the stone fill, foundation, filter layer and connections so that missing components are identified before delivery.
Define the location and design conditions
An enquiry should identify whether the mattress will protect a bank slope, channel bed or another location, and include a layout, cross sections and site conditions. Mattress thickness, protection limits, toe details and edge treatments must follow the project design rather than a commonly stocked size. Flow, scour, debris, sediment abrasion and water chemistry can all affect selection. The flexibility of the mesh allows some deformation, but does not establish suitability for every river reach or replace foundation stability checks and hydraulic design.
DECISION TABLE
Confirm the parameters against the project
Start with the application, then carry the required checks into the enquiry.Swipe horizontally on mobile to view the full table| Decision area | What to assess | Confirm in the enquiry |
|---|---|---|
| Application | Define the actual application | Environment, function and installation |
| Specification | Confirm product and dimensions | Material, specification, quantity and tolerance |
| Delivery | Align packing and destination | Timing, packing, drawings or photos |
Specify the complete mesh unit
List length, width, thickness, mesh opening, mesh wire and selvedge wire diameters, diaphragm arrangement, lid configuration, connection materials and corrosion protection requirements. Distinguish the metallic wire diameter from the overall diameter after polymer coating so that quotations use the same basis. Specify the coating type, covering material, inspection documents and acceptance requirements. Colour alone does not establish corrosion resistance, and another manufacturer's proprietary coating name should not be presented as a performance claim for the supplied units.
Coordinate stone fill with openings and thickness
Stone is an essential component of the protection structure. Before purchase, confirm its source, size distribution, durability and cleanliness. Do not assume that readily weathered stone or mixed demolition waste is suitable. The grading must satisfy retention requirements for the mesh and be compatible with mattress thickness and the design. Oversized stones may be difficult to arrange, while excessive small material can escape or produce uneven filling. Estimate quantities using the design volume, trial filling and actual packing conditions. A fixed tonnage conversion should not be treated as a universal rule for every project.
Check the filter layer as a system
A permeable mattress does not automatically prevent loss of the underlying soil. The filter must be compatible with the foundation soil, hydraulic conditions and protection details. Whether the design uses geotextile or graded granular material, communicate material requirements, overlaps, edge treatment and protection during installation. Check the prepared surface and remove sharp objects that could damage fabric. Avoid direct impact during stone placement. As the filter becomes difficult to inspect after covering, retain inspection records and photographs before the mattress is installed.
Make connections and lids part of a continuous system
Connect adjacent units, lids and diaphragms according to the drawings and applicable supplier installation instructions. At delivery, verify the quantity and material of connectors and their compatibility with the specified corrosion protection. Maintain compartment shape and follow the filling sequence, avoiding local stone piles that distort diaphragms. Before closing lids, check that filling is even, edges align and connections are complete. Do not use excessive force on a lid to conceal a filling problem. Establish details for corners, ends and transitions between different thicknesses in advance.
Inspect deliveries and carry out a trial assembly
Before unloading, compare package labels with the delivery list and check panels, selvedges, lids and diaphragms for visible damage. Confirm that connection materials are complete and label different configurations separately to prevent mixing. Before full installation, assemble a unit according to the instructions to confirm orientation, connection sequence and lid closure. Obtain the appropriate project approval before changing dimensions on site; do not casually cut panels or remove diaphragms. Record missing parts, deformation or coating damage and contact the supplier for resolution.
Keep records useful for maintenance
Record unit batches, stone sources, concealed work inspections and lid closure by work section. Retain both overview and detail photographs. During service, use the project maintenance plan to arrange inspection after events such as flooding by personnel able to access the site safely. Observations may include broken wire, open lids, lost stone and erosion at boundaries. Assess the cause and site conditions before selecting a repair method. Supplying drawings, quantities, environmental conditions and delivery requirements helps define the supply scope and supports later traceability.
References
This article supports procurement and installation preparation. Project design, acceptance requirements and applicable installation instructions govern the specific parameters and methods.
QUOTE CHECKLIST
Prepare for a quote
- Application and safety level
- Total run and segments
- Fence height and opening
- Wire and finish
- Posts, spacing and footing
- Gates, corners and terrain
- Quantity, packing and destination
- Drawings, photos and lead time