the post the width of the anti shearing device where the construction is exerted to extra large loads for example at the deck bearing for a mast should be at least twice as wide as the corresponding width at the posts widest end when the anti shearing device is composed of a composite fibre material the number of layers should be preferably 3 or more even more preferably 4 or more and most preferably 5 or more the fibres used should preferably have no or few joints the construction may be produced by making the outer cover first the fibres that may be in the form of a knitted or braided cloth or stocking or which may be applied in several layers have preferably the directions 0 u00b0 90 u00b0 60 u00b0 right twist or 60 u00b0 twist with respect to the construction 39 s longitudinal direction 15 a and 15 b the longitudinal fibres 0 u00b0 and 60 u00b0 direction have preferably no or few joints and are at least as long as the construction the fibres and matrix are applied on a master form and the curing can preferably be performed by heating the composite fibre material to an elevated temperature and thereafter providing controlled cooling during the curing process after the curing the master form is removed and leaves a composite fibre material tube.