Using a marine grade heavy tramp mat material designed specifically for this type of job. There are a couple of fixing options and will depend on the individual yacht. A combination of stainless steel eyelets and spectra line should be used when lashing to hull.
No expense should be speared in construction of tramp mats must be able to support at least 400kg on individual tramp and a conscious effort to maintain and check tramps regularly. Once tramp has been lashed to hull and tensioned a gap of 80mm should still be visible this will allow for tensioning and adjusting later on.