For full functionality of this site it is necessary to enable JavaScript. Here are the instructions how to enable JavaScript in your web browser.

Tying systems: the minimum force on an internal beam line - the values of q3 and Q4

Eurocode 2 part 1-1: Design of concrete structures   9.10.2.3 (4)

In floors without screeds where ties cannot be distributed across the span direction, the transverse ties may be grouped along the beam lines. In this case the minimum force on an internal beam line is:

Ftie = q3⋅(l1 + l2) ≥ Q4 (9.16)

where:

l1, l2
are the span lengths (in [m]) of the floor slabs on either side of the beam.

Recommendation

The recommended value of q3 is 20 kN/m and of Q4 is 70 kN.

National choice

q3
Q4
...
[kN/m]
[kN]
...