That's a great initiative to help keep public spaces clean! The best way to mount a standard public ashtray (the cylindrical, metal kind) onto an existing outdoor trash can is by using a method that's secure, durable, and doesn't require welding. Here’s a natural, step-by-step approach based on what works in the real world.
First, gather your materials. You'll need the ashtray itself, 2-4 heavy-duty stainless steel hose clamps (large enough to wrap around both the ashtray and the trash can's frame or body), a drill, appropriate drill bits (for metal and possibly the trash can material), a marker, and maybe some rubber or neoprene strips as padding.
Start by positioning the ashtray on the trash can. The ideal spot is often on one of the support posts or the sturdy body of the can, well above the actual bin liner area. Make sure it's at a convenient height and doesn't interfere with the lid. Once you've found the perfect spot, hold it firmly and use your marker to mark the drilling points through the ashtray's existing mounting holes onto the trash can's surface.
Now, put on safety glasses. Drill pilot holes at your marked points on the trash can. The key here is to use a bit slightly smaller than the screw that will come with your hose clamps. This gives the screws something to bite into for a really firm hold.
Next, take your hose clamps. Place a rubber strip between the ashtray and the trash can to prevent scratching and reduce vibration. Wrap a hose clamp around the entire assembly—cinching both the ashtray and the trash can post/body together. Thread the screw through the ashtray's mounting hole and into the pilot hole you drilled, then tighten it down using a screwdriver or wrench. Repeat this process for the other mounting holes. The hose clamps distribute the pressure and provide incredible lateral support, preventing the ashtray from wobbling or being easily removed.
Finally, give it a good test. Give the ashtray a firm tug and shake to ensure it's solid. That's it! This method is low-cost, incredibly strong against weather and tampering, and doesn't permanently alter the ashtray itself. It keeps cigarettes contained and makes disposal easy for maintenance crews—just unlatch the trash bin liner without disturbing the ashtray mount.