Prestressed beams

Prestressed beams

The PRAD bridges are made of PRestressed by ADherence beams (pre-tension) secured by a concrete slab cast on site (on integrated formwork).

The beams are interconnected by spacers only at their supports.

Beams with slabs (PF) :

Poutre avec fruit (PF)

Those beams are used for spans from 6 to 15m of length.

The width of these beams can be 15, 20, 25 or 30 cm with maximum heights of :

50 cm for

beams of 15

60 cm for

beams of 20

70 cm for

beams of 25 and 30

poutres

Constant Inertia beams :

These beams match spans between 12 and 38m.

Heights from 65 cm to 1,72 m.

Poutre à Inertie Constante

T-shape beams

Or beams with integrated decks.

These beams match spans from 9 to 32m.

Advantages :

Gain on number of erection operations

 

Reduced time on site
Principe de pose des poutres T

Profiles beams following the heights

10 cm20 cm30 cm40 cm50 cm60 cm70 cm80 cm90 cm100 cm110 cm120 cm130 cm140 cm150 cm160 cm170 cm
PF15xxxxxx
20xxxxxxxx
25xxxxxxxxxx
30xxxxxxxxxx
IC35xxxx
40xxxx
45xxxx
50xxxx
60xxxx
70xxxx
85xxxx
90xxxx
100xxxxx
120xxxxx
TTRxxxxxxxxxx
Txxxxxx
T’xxxxxxxxxxx

Profiles of the beams following litters

567891011121314151617181920212223242526272829303132333435363738
PF15 xxxxxxxx
20 xxxxxxxxx
25xxxxxxxxxxx
30xxxxxxxxxxxx
IC35xxxxxxxxx
40xxxxxxxx
45xxxxxxx
50xxxxxxxx
60 xxxxxxx
70 xxxxxxxxx
85xxxxxxxxx
90xxxxxxxxx
100xxxxxxxxxx
120xxxx
TTRxxx x x x x x x x
T x x x x x x xxxxx
T’ x xx xxxxxxxxxxxx