the invention provides a method for demounting a cable tensioned between a first and second anchorage points on a structure . the method comprises the following steps : slackening the cable so that a running part of the cable is freed from one of said first and second anchorage points ; freeing said running part of the cable from the other said first and second anchorage points ; supporting said running part of the cable ; and removing said running part of the cable away from at least one of said first and second anchorage points .