Installation Details

The table below indicates typical centres of the supports for RIB21 used in construction joints up to 3000mm in depth.

RIB21

• Fastens by wire tying to steel/rebar or by nailing to timber supports.
• Fixed with the ribs running horizontally or vertically and supported at right angles.
• Ensure 21mm ribs point into the area being prepared for the concrete pour.
• Apply the same concrete cover as the rebar.
• Achieve cover zones by using timber strip at top and bottom edges.
• Join adjacent sheets by nesting outer ribs and wire tying.
• Support and overlap end on end sheets by a minimum of 50mm.
• Fix overlapping sheets of RIB21 by wire tying sheets tightly together in order to reduce the gap between the sheets.

Concrete details

• RIB21 can be used with most grades of concrete.
• Pour concrete 500mm away from RIB21.
• Vibrating pokers should be used 450mm away from RIB21 and operated until concrete begins to bleed through mesh profile.
• Monitor pour carefully and operate bursts of 5-10 seconds in instances where poker is closer than 450mm.
• Remove excess grout, taking care not to disturb the concrete RIB21 face.

Note: All temporary works must be designed by a competent engineer.

Download the RIB21 product brochure here [pdf 302kb]