roof structure (rafter at same level with purlin)

[Anonymous]

hi i need help

when i make beam sytem for roof structure the beam is in same level.

but i want the rafter at the top of the purlin. 

what shoul i do...

thanks

[RDAOU]

@Anonymous 

Select the Beam system of the Rafters...On the Properties Panel >> Set an Elevation Value = H of the Perlin below