Sculpted Prims - Basic Building Boards Needed?

I would like to start building structures that use prims like boards, with angles cut into the ends so they fit together properly without overlap.

For example, say I want to create a building that has one tall prim, one at a 45 degree angle, then one straight accross, then another 45 then back down again. (straight outside walls, and a roof with 2 angles and a flat top)

At home I'd get out the ol' miter saw and cut the angles to match. In SL, it doesn't appear you can cut one end of a prim without going to sculpted prims.. or by being sloppy and just overlapping prims.

I've seen collections of prims for making stairs etc. on slexchange, but these typically have the same angle cut on both ends.

Does anyone have a collection of angle-cut prims for projects like this... or... without getting really fancy, what tool might I use to make simple "boards" or "beams" for my buildings.

prolly best asking this question in building tips. I dont have a clue at all how you would do this. Over there they will explain it in a lot more detail.
Could you not buy one of the stair boards and flip the other one over 180. If it is the same angle at the end.
See? this is about the sum total of my knowledge lol

Sorry, I wasn't sure if building tips was for just tips or for also asking building questions. Dang.

I did start with a deck board that had a cut in it, but the problem is its cut on both ends and not in the way I would need them to be.

If this is a bad place I'll re-post over in the building area. Sorry for that.

With the exception of the Scripting Library forum, the Content Creation forums are all for asking questions or offering suggestions, regardless of whether they have the word question in the title.