The BG System is a heavy-duty, double-celled, extruded, thermoplastic rubber gland flanked by integral side flashing sheets.

The system consists of:
1) Thermoplastic (heat-weldable) BG sealing insert and side flashing sheets
2) Termination bar and special anchors

The above components are combined in the field with a waterproofing membrane and accessories offered by the waterproofing membrane manufacturer for use in blind forming conditions.

The waterproofing membrane is installed on the mud-slab or lagging in accordance with the waterproofing membrane manufacturer's instructions.

The BG SYSTEM sealing gland is positioned over waterproofing membrane at the centerline location of the structural expansion joint.

The underside of the BG SYSTEM side flashing sheets are adhered to the installed waterproofing membrane using an adhesive mastic provided by the waterproofing membrane manufacturer as tested and approved for this purpose.

Another layer of the adhesive mastic is applied over the top of the BG SYSTEM side flashing sheets to a width which is wider by at least two inches than the BG SYSTEM side flashing sheets.

Another full width layer of waterproofing is firmly, and without any voids, adhered into the adhesive mastic thereby completing a sandwich of the BG SYSTEM side flashing sheets and the waterproofing membrane and adhesive mastic.

The BG SYSTEM termination bar and anchors are installed to hold the system in place prior to pouring concrete.

The concrete is poured over the waterproofing membrane and BG SYSTEM sandwich.

The net result is the integration of the below-grade waterproofing membrane and expansion joint system on the positive side (the side that water reaches first) of the wall or floor while ensuring that movement at the joint-gap is properly accommodated.

 

Uses, Applications

For use at structural expansion joints in foundation and tunnel floor and wall slabs where access to the positive side is not possible after casting.

Suitable for installation where access to the positive side of walls is impossible, such as in:
1) lagging or single-side forming conditions
2) across the underside of foundation and tunnel slabs.

NOTE: Where access to walls roof slabs is possible, the BG SYSTEM would be used on the underside of the floor slab only. A factory-fabricated upturn from the the BG SYSTEM would be welded to the components of the full MIGUTAN FP 110/25 (consult ALLCO) for use on the walls, which in turn would be welded to the sealing components of the MIGUTAN FP 110/... best suited to the design requirements of the roof slab.