Construction d'une terrasse !!

Bonjour, je viens vous sollicitez pour quelles questions techniques sur la construction d'une terrasse surélevée.

Pré-requis, le dessous de la terrasse doit être accessible ( utilisation avenir, pour stationner un véhicule)


- Le mur identifié par B est un mur mitoyen, je compter donc mettre des poteaux (Bois ou Béton ?, quel section?)

- Le mur identifié par A est le mur de ma maison les solives seront donc encastrer dans celui-ci.
- Le point C je compter mettre un poteau pour rajouter un linteau du mur A au point C afin de réduire les longueur des solives sur la partie la plus petite (nécessaire ou pas ?).

- Vue la longueur des solives quel section me conseillez vous, quel espacement ? en mettant des IPN pourrais je diminuer la hauteur des solives ?

- Est il possible de mettre des lattes en bord a bord ou existe t-il des lattes qui ce clips (genre parquet flottant) pour limiter l'eau dans la partie dessous ?

ci-dessous un schéma simple de la construction (les traits et pointillés sont des murs)
                                                                                               3M
                                               _____________________________________________
                                               |                                                                                                       |
                                               |                                                                                                       |
                                           A  |                                                                                                       |
                                               |                                                                                                       |
                                               |   2,3m                                                                                           |
                                               |                                                                                                       |  B
                                               |                                                                                                       |
                                               |                                                                                                       |
                   1,40m                |                                                                                                       |
____________________|                                                                                                       |
|                                                                                                                                                      |
|                                                                                                                                                      |
|                                                                                                                                                      |
|  2M                                                                                                                                               |
|                                                                                                                                                      |
|                                                                                                                                                      |
|                                              +                                                                                                      |
                                               C                                                                                                      


Voilà en espérant avoir était clair, cordialement Jean-François Tauzia