Layouts
Each room here is planned the same way: find the three measurements that decide it, take them, and see what they rule out. Parts appear at the end, as a consequence of the numbers, and never before them.
Rooms on this site
Living Room With a Wall-Mounted TV
Studs, wall width and seated eye height, and the order that keeps a bracket from being chosen first.
Living Room With a Projector
Depth along the center line, the image width you tape up, and the outlet the lens position needs.
Small Apartment Without Drilling
Furniture depth, surface height and cord path, for a room where the walls are off limits.
Bedroom Screen and Sound
Pillow eye height, pillow-to-wall distance, and the raised standard for anything above a bed.
Basement Media Room
Headroom at the lowest duct, cable runs measured in segments, and the moisture rule that stops the job.
Backyard Movie Night
Throw distance on grass, reach to an outdoor-rated outlet, and the rule that ends the evening.
Dorm Room Setup
Short distances, one socket, and no fixings: the room where the constraints do the deciding.
Reading the plan
The drawing beside each room is that room seen from above. The thick line is the screen wall. The pale wedge is the sight line from the middle seat, and the amber dots are the places people actually sit. Thin lines are walls; a dashed one is a side that opens into something else.
It is a diagram of the geometry, not a scale drawing of your room. Its job is to show which wall the screen is on and where the sight lines land before you read a single measurement.
Limits from the room
Every room here carries the same boundary, because it comes from the work rather than the place: locating structure, lifting a panel, and anything touching mains power are the points where the job stops being yours. Each room page states that boundary under Safety.
These rooms add a second limit on top of it, and that one belongs to the room itself.
Bedroom Screen and Sound
Whatever goes on this wall ends up above a person who is asleep and cannot move out of the way, so the standard for fixing it is higher than in any other room.
Basement Media Room
Moisture is a property of the building rather than of the job, and the ducts and pipes crossing the ceiling belong to systems nobody in this room installed.
Backyard Movie Night
Power outside the house is a different class of equipment with no indoor substitute, and the weather can end the evening at any point without asking.