How Do You Build a DIY Golf Simulator Enclosure With EMT?
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Build an EMT enclosure around your chosen screen, using the tubing size, fittings, and cut list specified for that enclosure design. Assemble the frame square, smooth every cut end, and pad any metal a golf ball could reach. Don't hang a projector or overhead launch monitor on it unless the system is designed to carry that load.
The screen comes before the pipe
EMT is electrical metallic tubing: metal conduit sold in standard lengths and sizes. It shows up in a lot of DIY golf-simulator frames because it's straight, easy to find, and joins with purpose-made fittings.
Still, choose the screen first. You need its viewable size, overall installed size, attachment method, and the space it wants behind it. Carl's Place specifies at least 8.25 inches behind its DIY enclosure for the rear fittings and recommends a 12-inch rear buffer. The smaller figure only gets the fittings into the room; it isn't a screen-movement allowance. See Carl's DIY enclosure dimensions. So a 10-foot-wide image doesn't mean a 10-foot-wide enclosure. The frame, side material, fittings, and screen movement all add to it. If the screen isn't picked yet, go through impact-screen size, clearance, and mounting before you cut any pipe.
Which tubing size?
Whichever one your enclosure design specifies. Carl's Place uses 1-inch EMT for its DIY enclosure kit and 2-inch EMT for its Pro enclosure, and other systems use different tubing or connectors. Its Pro assembly guide explains why those sizes are not interchangeable.
The size is a trade name, not a measurement. Carl's Place lists the outside diameter of U.S. trade-size 1-inch EMT as 1.163 inches on its DIY kit page. A fitting made for one outside diameter may not clamp another tube properly even when the nominal sizes sound close, so work from the current cut sheet or assembly guide for the enclosure you're building.
Cutting and dry assembly
Cut from a list instead of measuring as you go, and label pieces as you cut them, especially lengths that are nearly the same. If long spans need splice fittings, put them on the list before you buy pipe.
Use a tool made for cutting metal tubing, and wear eye and ear protection. Deburr every cut, as Carl's Pro assembly guide recommends. A rough end snags fabric, fights the fitting, and can slice a hand during assembly.
Build the base on the floor first and work upward in a stable order. Before the screen goes on, check the finished width, height, depth, and diagonals. If the frame is noticeably out of square, fix it now, before the screen is under tension.
Padding
Watch the front pipes and corners. A low shot, a shank, or a high wedge can miss the middle of the screen and hit the frame, and bare metal can send the ball straight back toward the hitting area. Use the padding or frame protection the enclosure maker recommends. The room-protection guide goes through the same miss paths for the rest of the room.
Your usual shot pattern is the wrong test here. Pad for the one you never mean to hit.
Can the frame hold a projector?
Only if the maker says so. A projector, an overhead launch monitor, or other mounted electronics add weight and can change how the frame behaves. Carl's Place shows the split inside one brand: its Pro enclosure page says the frame supports mounted electronics and offers an optional crossbar. Its Pro assembly guide warns that the 1-inch tubing used in its DIY enclosures cannot carry an overhead launch monitor or mounted projector.
Without that statement from the manufacturer, mount the electronics independently to suitable building structure or put them on a separate stand. Which joist or wall counts as suitable is a call for someone who knows how the house was built.
Is it worth the extra work?
EMT pays off when it solves an actual room problem: an odd width, a low beam, a garage layout, or a screen size the standard packages don't handle well. If a ready-made enclosure already fits, add up pipe, fittings, padding, tools, shipping, and your own time before you assume the DIY version is cheaper.