The purlins are secondary roof girders of trapezoid and T section. The purlins rely on the main girders of the roof structure. The dimensions of the cross-section depend on the span and the roof load. They can be prestressed and classically reinforced.
They are produced in the following dimensions: TR 45 (h=45 cm, Lmax = 15m), TR 60 (h=60 cm, Lmax= 15m), TR 80 (h= 80 cm, Lmax= 20 m). The girder TR 100 can also be used as a purlin.
Cross section
Secondary carriers - corneas of trapezoidal section
TR45 (h=45cm) - TR60 (60cm) max L=15m
Cross section in the middle
Cross section at the ends
Cross section in the middle
Intersection at the ends
Intersect
Secondary carriers - T-section corneas
TR80 (h=80cm) max L=20m
Cross section in the middle
Cross section at the ends
