Barricade A - Miranda's Butt Store

The barricade looks great and it has only 1 land impact or you can link 2 and then both still have only 1 land impact.

My avatar is about 2.10 meters tall with high heels.

The barricade in delivered size goes from its height about to the belly.
But even with this barricade size you notice that you can't reach the barricade from behind. The feet at the back of the barricade determine how far you can get to it.

That's stupid, of course, because it's not realistic.
That's why I set the barricade to phantom and put a prim on it, so that you can get to the barricade from behind, but you can't walk through it.

I made the barricade so big that only the forehead of my avatar looks over it at the higher points. This allows me to still shoot over it in the middle lowered part.

The land impact did not become larger thereby.

But if you didn't put the barricade on Phantom, you would stand even further away from the back of the barricade.
So for each barricade, which obviously have 0.5 land impact each (not linked with a second one = 1 land impact each), you might need 1 object with 1 land impact, if you really want to set up the barricades to protect against projectiles and not just use them as decoration.
You can't track all the angles of the barricade with a single prim - so you might need 1 or 2 more prims.

LOD (have set it to 3500 most time in ultra graphics settings): when you move away with the camera, the first thing that happens is the struts partially dissolve, go from light to dark and somehow less. But for me still ok, because the barricades can still be seen for a long time and only disappear together with the surrounding rest - depending on the setting of the visibility.