3. Lightweight frames

3.1 Truss buckling

There are 80 truss losses per year, or 1% of the total construction total. Of the 170 truss claims analyzed in the [3] survey, 66 were due to transverse buckling, which was the cause of 10 of the 14 collapses. These cases of buckling are examples of a series of statutory claims.

The buckling of the trusses shown in figure 12 is typical. The professional design and calculation rules applicable until the publication of DTU 31.3 in May...