(a) Straight bar Figure 8.7 Anchorage at an indirect support
As in Section 8.3.1 above, anchorage lengths and support widths can be obtained for both straight bars and hooked bars.
The anchorage lengths are as Section 8.3.1 but the required support widths are increased.
Assuming 20 mm cover b(a) = (33.30 + 20) x 1.5 = 500 + 30 mm b(b) = (23.30 + 20) x 1.5 = 350 + 30 mm
The minimum support beam width is given by bmin = (100 + 20) x 1.5 = 150 + 30 mm where the same conditions apply as in Section 8.3.1.
In these cases, as the beam is indirectly supported, i.e., by another beam, 30 cover perpendicular to the plane of the curvature can be achieved more easily and aa = 0.7 can be readily used in EC2 Eqn 5.4.
The required support beam widths are given in Table 8.2. Table 8.2 Width of support beam (mm)
Was this article helpful?