Last year we reviewed a failed warehouse yard outside Tralee. The original slab had been poured on what looked like solid ground—but six months later, it was cracked corner to corner. Turned out the subgrade was layered over a thin solution feature, classic Kerry karst. Rigid pavement design needs more than a standard CBR value around here. We look at the whole profile: the limestone bedrock, the overburden, the drainage pattern. If the support isn't uniform, the concrete slab works in flexure in ways the thickness calculations never anticipated. Before we touch a mix design, we run a test pit programme to map the depth to rock, and often combine it with CPT testing where access allows, to get a continuous stiffness profile without missing soft lenses.
A concrete slab on karst is a bridge deck in disguise—design it for what's not there underneath.
Frequently asked questions
What's the typical cost for a rigid pavement design in Tralee?
For a standard industrial yard or access road in the Tralee area, the design package—including ground investigation, subgrade assessment, structural calculations, and jointing plans—typically runs from €1,710 to €5,380, depending on the area and the complexity of the karst conditions. A simple slab on uniform ground sits at the lower end; a heavily reinforced pavement over variable rockhead with a full drainage and stabilisation design moves toward the upper end.
How long does the design process take from start to finish?
A typical rigid pavement design project in Tralee takes three to four weeks. The first week covers the site investigation—test pits, plate load tests, and sampling. The second and third weeks are for laboratory testing of the subgrade and concrete mix design verification. The final week produces the detailed drawings and jointing schedules. If the ground investigation reveals unexpected karst features, we may need an extra week for supplementary testing and design iteration.
Do you handle the construction supervision as well, or just the design?
We can provide construction-phase support: checking the subgrade preparation before the sub-base goes down, verifying the reinforcement placement, and monitoring the concrete pour and curing. We don't take on the main contractor role, but we act as the designer's representative on site to ensure the slab gets built to the specification. This is particularly useful on Tralee sites where the ground conditions can change between design and construction.
