Thresholds, registration methods, and fines for concrete plants and ready-mix operations
The concrete sector sits at an interesting intersection of CIAW regulations. Concrete plants, ready-mix delivery drivers, and on-site pumping crews all interact with construction sites, but the registration obligation depends on what they do and where they do it.
This article clarifies when CIAW applies to concrete operations, who needs to register, and how to handle it practically.
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When Is CIAW Mandatory for Concrete?
The key question is whether the activity qualifies as real estate works (werken in onroerende staat). For the concrete sector:
| Activity | CIAW? | Reason |
| Pouring concrete on a construction site | Yes | Real estate works, directly part of the building process |
| Operating a concrete pump on site | Yes | Equipment operation as part of construction |
| Ready-mix delivery to a qualifying site | Depends | Driver enters site → must register. Drop-off at gate only → grey area |
| Manufacturing concrete at a plant (off-site) | No | Not real estate works, manufacturing activity |
| Delivering pre-cast elements + installation | Yes | Installation = real estate works |
| Delivering pre-cast elements without installation | No | Delivery only, no real estate works |
The Ready-Mix Delivery Grey Area
Ready-mix truck drivers present a practical challenge. If the driver enters the construction site to pour concrete, they are performing real estate works and must be registered. If they drop off at the site gate and leave, the obligation is less clear.
💡 Best practice: When in doubt, register. The cost of registering a driver who doesn’t strictly need it is negligible. The cost of not registering one who should be (€6,000/day) is significant.
How to Register Concrete Workers
- Drivers who enter multiple sites daily, mobile app with GPS verification is the most practical method. Clock in at each site, clock out when leaving
- Pump operators stationed at one site, app or site terminal. Register once at the start of the day
- Delivery + installation crews, vehicle hardware with geofence. Automatic registration when the truck enters each site boundary
All methods require connectivity (WiFi/mobile data) for real-time NSSO transmission.
Frequently Asked Questions
Does the concrete plant itself need CIAW?
No. CIAW applies to construction sites, not manufacturing facilities. Workers at the plant don’t need CIAW registration unless they also work on qualifying sites.
What about subcontracted concrete pumping?
If you subcontract pump operators to work on a qualifying construction site, they must be registered. The main contractor’s CIAW obligation covers all workers on site, including subcontracted concrete crews.
Read the full CIAW FAQ or explore the CIAW solution.
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