Riser Mounting
Risers (and non-release skiboard bindings) are attached to skiboards using the same inserts that snowboards use for binding mounting. These inserts are machine threaded steel and installed in the core of the board at the time the boards are manufactured. They look a bit like an upside down mushroom with a short stem sticking up. I've never seen the pull-out strength for these published, but my guess is that it's north of 500 lbs. each, so four of them equally tensioned would be a ton or more. I've never heard of an insert pulling out.
Ski bindings are all mounted with screws that are a sheet metal thread (12AB) and they provide 8 millimeter penetration into the board in the adult length (6mm in the junior length). That length means that the point of the mounting drill for these screws goes 9mm into the ski. Most skiboards are made with a thin layer of top glass and a soft wood core, so a screw such as a binding screw can be pulled out on a hard heel-first landing off a jump, etc. For safety, these screws need to be mounted on a board where the thickness is at least 10mm and the board has a reinforcement layer where the screw penetrates.
Risers (and non-release skiboard bindings) are attached to skiboards using the same inserts that snowboards use for binding mounting. These inserts are machine threaded steel and installed in the core of the board at the time the boards are manufactured. They look a bit like an upside down mushroom with a short stem sticking up. I've never seen the pull-out strength for these published, but my guess is that it's north of 500 lbs. each, so four of them equally tensioned would be a ton or more. I've never heard of an insert pulling out.
Ski bindings are all mounted with screws that are a sheet metal thread (12AB) and they provide 8 millimeter penetration into the board in the adult length (6mm in the junior length). That length means that the point of the mounting drill for these screws goes 9mm into the ski. Most skiboards are made with a thin layer of top glass and a soft wood core, so a screw such as a binding screw can be pulled out on a hard heel-first landing off a jump, etc. For safety, these screws need to be mounted on a board where the thickness is at least 10mm and the board has a reinforcement layer where the screw penetrates.
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