Custom Rock Bags
When the standard weight classes don't fit the job, FES engineers a rock bag to your specification — dimensions, mesh, fill, and rigging built around your hydraulics and placement method.
Engineer every variable to the job.
A custom Texas Tuff Rock Bag uses the same engineered, raschel-weave virgin-polyester mesh as the standard range — configured around your project rather than a catalog size.
Dimensions & weight
Filled weight and diameter built to your hydraulics and footprint — between, above, or below the standard 1- to 8-Ton classes.
Mesh aperture
Aperture matched to your fill gradation and retention needs — from fine 25 mm up to the coarse 50 mm offshore weave.
Mesh layers
Single through quad-layer construction for added abrasion resistance and strength in high-energy or subsea exposure.
Fill specification
Rock, shell, or aggregate to your gradation — filled on-site with local or supplied material to control cost and logistics.
Rope & rigging
Lifting rope diameter and configuration sized for your placement method — excavator, crane, or vessel and ROV.
Marking & documentation
Project marking and the test data and certificates of compliance your specification package requires.
When a standard size won't do.
Most projects are well served by the four standard weight classes. Reach for a custom build when the job pushes past them.
Compare standard sizes- Hydraulic loading falls between two standard weight classes
- Subsea or high-energy placement demands a heavier mesh or rope spec
- Fill gradation or aperture must meet a specific retention requirement
- Footprint or access constraints rule out a standard diameter
- A specification calls for documentation or marking beyond the standard sheet
From hydraulics to delivery.
Engineering consult
Share your flow velocity, depth, substrate, and placement method. Our engineers review the hydraulics and constraints with you.
Spec & proposal
We return a recommended build — dimensions, mesh, fill, and rigging — with supporting data, lead time, and pricing.
Manufacture
Bags are produced to the agreed specification with the same virgin-polyester mesh and QA as the standard range.
Delivery & support
Stocked inventory and fast lead times, with placement guidance and documentation for your project package on arrival.
Compare the other sizes.
Light scour, small streambanks, residential and lakefront projects.
View Top pickMost-specified size — streambanks, shoreline revetment, and light-to-moderate scour.
ViewHeavy-civil size — bridges, riverbanks, and port toes in higher-energy conditions.
ViewOffshore, oil & gas, and severe-current coastal applications.
ViewProject-specific applications where standard sizes don't fit. Talk to engineering for sizing.
You're hereTell us about your project.
Send your hydraulics, depth, and placement method and our engineering team will confirm sizing, lead time, and pricing — usually within one business day. Stocked inventory, fast lead times.