from the railing bolt 44 nondetachably fixes the rail to post 22 and said bolt cannot be removed when post 22 is capped by said cap 12 fig4 d depicts cap 12 welded onto post 22 such that nut 46 cannot be removed from carriage bolt 44 cap 12 also known as concealment plate 12 is l shaped and completes the top and side of channel shaped post 22 the horizontal truncate part of concealment plate 12 completes the top of the post and the elongate vertical part completes the side channel post 22 has two small sections of angles welded to each side of the post for the cover plate to slide through trapping concealment plate 12 on each side and the horizontal top of concealment plate 12 is secured by self tapping screws so that no welding is needed upper and lower rail assembly 40 circled in fig4 c is easy to assemble in the field and requires modest levels of experience or training if fasteners are precast into a concrete structure the installation of mounting plates 42 onto the fasteners merely requires insertion of pad 52 such as a neoprene pad and shimming to plumb on level surfaces and gentle grades either an edge shim or beveled shim plates may be used for shimming to plumb for example once mounting plates 42 are shimmed and fastened to the pavement the remaining steps quickly erect segments of the railing lower rail 26 is fastened to posts 22 pickets 23 are then respectively inserted into pre cut holes 15 in each insert 24 of lower rail 26 upper rail 26 which may be identical to the lower rail is fitted onto pickets.