A2. Anchorage of Links and Shear Reinforcement

Code Compliance & Reference

This detail complies with HKRC2004 Clause 8.3 regarding the minimum internal bend radius and Clause 8.5 & Figure 8.2 regarding the anchorage links and shear reinforcement.

Comments

1. The anchorage length for 90-degree bend is slightly longer than that specified in BS8110:1985.
2. The size of the longitudinal reinforcement inside the bend is REQUIRED to be equal or larger than that of the links and shear reinforcement. The designer should take note of this requirement in their preparation of beam/column details; specifying such requirement in the typical details can cause confusion to the contractor as there may be conflict between this detail and the beam/column details.
3. I found that in many consultants’ typical details, the anchorage lengths are specified in other details too (i.e. besides THIS detail, i.e. on arrangement of column links). Those anchorage lengths should be removed to avoid complications, and instead those bends should be labeled as “90-degree hook” etc. (and thus the reader is assumed to refer to this detail).

Blog note: You may notice that the first detail is ‘A2’instead of ‘A1’. This is because the detail ‘A1’ is a bit complicated and I would rather start my discussion on an easier detail first!
Feel free to comment on this detail and any other details that follow!! Thx~