MegAtec 310 — metal floor and floor-to-wall expansion joint
A plate-type aluminium joint fitted from finish-floor level, with no visible fixings on the walking surface. Rated to ASTM E-1399 Class III for seismic movement and specified for the busiest pedestrian floors — expansion gaps 50 to 250 mm.
Specifications
| Expansion gap | 50, 75, 100, 150, 200 and 250 mm |
| Movement capacity | ±25 mm at a 50 mm gap, rising to ±100 mm at 200–250 mm (total movement 50–200 mm — see TDS) |
| Standard | ASTM E-1399 · Class I (thermal), Class II (wind), Class III (seismic) |
| Traffic | Rated in the datasheet's highest pedestrian band — over 25,000 movements per day. Eurocode load ratings 10, 30, 69 and 300 kN |
| Surface | No visible fixings · 16 mm profile height · 20/25 micron clear satin anodised finish |
| Material | 6063 T5 & T6 aluminium |
| Fire & waterproofing | Fire barrier 120–240 minutes; moisture barrier |
| Assembly | Pre-assembled in the factory before dispatch |
Why the 310 gets specified
It goes in after the screed
Unlike the mother-slab systems, the 310 is fitted from finish-floor level. That takes the joint off the structural critical path — it is installed with the finishes, not cast in months earlier, and a damaged joint can be replaced without breaking out the slab.
Nothing shows on the surface
The plate fixes into the frame, not through the face. There are no cover-plate screws to work loose, collect dirt or trip a trolley wheel — which is why it suits hospital corridors, airport concourses and retail malls.
One frame across every gap
A single frame section serves the whole 310 family, and the 200 mm assembly also covers 250 mm. If the gap changes late in the programme, the frame does not — which keeps a redesign from becoming a new lead time.
It does not sound hollow underfoot
A continuous dampener is fitted under the plate, one metre per metre of joint. It is a small detail that decides whether a busy corridor sounds solid or drums every time someone walks the joint line.
Typical components
- Concrete slab and screed (by others)
- Continuous aluminium frame — one section across all gaps
- Aluminium cover plate, fixed into the frame with no surface fixings
- Sound dampener beneath the plate
- M8 concrete screw anchors
- Optional fire barrier and moisture barrier within the gap
- Floor finishes up to the frame edge
A01 is the floor-to-floor joint; A02 turns the joint up a wall using a corner frame and the same plate.
Applications
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