Beam Design Reinforcement Details – Reinforcement Detailing Beam

Beam Design Reinforcement Details

When a beam is designed with slab, referred to as slab beam or Tee-beam, reinforcements are provided as shown in parent below. The beam is usually designed as easy beam but extra reinforcement supplied on top with slab to make it behave like a Tee-beam.

According to supporting conditions

Simply supported, fixed, continuous and cantilever beams

Based on embedded reinforcement

Singly strengthened
Reinforcement are supplied to face up to tensile stresses due to bending and shear in beams for singly strengthened sections.

In practice, for singly bolstered beams, two additional bars are provided in compression face of the beam in order that stirrups can be tied with bars. These extra reinforcement are of nominal diameter of 8mm or 10mm.

Doubly reinforced
when depth of segment is restricted because of reasons together with architectural motives, or basement floors, the beam phase is designed as doubly reinforced concrete beam.

These bars shall withstand compressive stresses and are provided with reinforcement in compression face.

Beams when subjected to torsion are provided additional longitudinal and shear reinforcement to resist bending and shear stresses developed due to torsion.

Reinforcement Cover in Beam
Minimum cowl in beams must be 25 mm or shall no longer be much less than the larger diameter of bar for all steel reinforcement inclusive of links.

Nominal cowl laid out in Table sixteen and 16A of IS456-2000 ought to be used to fulfill the durability criteria.

Stirrups
this sort of reinforcement act towards shear force. Following are the types of stirrups supplied in beams:

Standard hooks and bends
Commonly, the provision of steel bar anchorage is in form of bends and hooks furnished that immediately length insufficient to expand bars.

Moreover, the anchorage fee of bend of bar is taken as four times the diameter of bar for every 450 bend subjected to maximum of 16 instances the diameter of bar.

Curtailment of Reinforcement in Beams
Generally, curtailment of reinforcements completed alongside beam span primarily based at the bending moment on the section. Moreover, anchorage or development length required at aid is supplied at some point of curtailment of reinforcement.

Bar Bending Schedule
Drawings usually encompass a bar bending schedule
bending time table shall specify bar period and number, position and the form of the bar