floor speakers installed on the wall.... ?

Depends on the type of speaker. What model? Type of home construction? 

Speakers are JBL Synthesis 4367 , and House is typical frame build with exterior veneer brick. Inner wall drywall   
 

the question is how the structure will respond. As of now speakers stands ove the crawlspace do it is kind of guitar effect. I’m not going to change location of the speakers I’m jus trying to lift them off the floor. 

are you the same guy I gave the correct answer to this question to on facebook?

No I have not discuss any of the gear issues on FB

ok that is completely different issue. 

What I'm looking for is to separate them from the floor meaning the shelf will be fixed to the wall and space out from floor.

Issue of the materials or design or weight will be separate from what I'm asking for

My system is in my shop,and I had my Klipsch Forte's on shelves I built in the corners, and it vibrated the walls something fierce. Took them down, and welded up some stands with rubber casters, for ease of placement.

Well I was expected that kind of reply to be honest with you 

Yeah, don't think that'll work in those wooden houses they have in the US. The whole structure will vibrate. 

The point of the question was to figure out if the bass will be more booming or more spaced out ?