Linear drain run - On top of sw pipe run

[Handyandi]

I am installing a short ramped block paved area at the top of a drive(sloping away from property) to meet a door & therefore will be breaking the 150mm below the DPC rule. In reading all the posts & articles am hoping to use a linear drain (FLoplast- since it seems to be 100mm, others are wider) - solution next the wall on the offending couple of metres & below the door sill (will be below the sill(DPC) rather than flush). The SW run I want to use is running directly below the proposed run & am not sure if I can fit in P-traps - will this be a problem. Is it possible to angle joints on linear drains making the piece under the door flat, then running down the ramp, needing only one outlet rather than two.
Also what order of bedding/haunching should I use. Existing SW is in pea gravel do I haunch the linear drain on top of this?

Few pictures @ http://s306.photobucket.com/albums/nn273/handyandi_photos/
Its the side door.
Looking forward to any replys.

Andi

[Tony McC]

If I've understood this fully, I think you're making a problem where none exists. As long as it is JUST the doorway, you can ramp up the paving to meet the threshold without needing to install a linear channel.