In the case of helmets which include localized projections from the shell, e.g. rivets, is it permissible to
use "bridging elements" so that the load is not applied directly to the projections?
Background: differing results in the lateral deformation test of one industrial helmet type had been
reported for UTAC and BSI. Different location of the loading plates on the sides of the helmets turned
out to be the reason for the discrepancy. Whereas UTAC located the loading plates directly on the shell,
notwithstanding any localized projections such as rivets, BSI bridged the projections on the shell by
means of wooden elements.