The contribution of the fibres to the longitudinal shear capacity when determining the Transverse Reinforcing is given by:

vr = 2.42 Acv

where Acv is the area of the concrete. When the deck is parallel to the beam, Acv only includes the area of concrete above the deck, but when the deck is perpendicular to the beam Acv includes the area within the deck rib. If the deck is parallel on one side of the beam and perpendicular on the other, the area of the concrete within the rib will be ignored when calculating the required transverse reinforcing for the side with deck parallel and will include the area of the concrete within the rib when calculating the required transverse reinforcing for the side with deck perpendicular.

The contribution of FibreFlor to vr is not combined with that of conventional reinforcement; if the FibreFlor is not sufficient alone, its contribution is ignored and conventional reinforcement is used, based on conventional design requirements.

When FibreFlor is used, the contribution of the concrete to vr is ignored but the contribution of the deck, vp, is included.

The contribution of deck parallel to the beam is ignored.