The purpose of this AD Note is to give advice on the design of composite beams and composite slabs when polypropylene heating pipe systems are installed within the concrete slab depth. Recommendations are made for the calculation of the cross section properties for both the composite slab and the composite beam formed with such a slab; recommendations are also given for the assessment of shear connection. It is noted that the concrete slab depth may have to be increased to accommodate these pipe systems, which would have implications for the design of the decking and structure.
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