The two spirals are welded at points where the steel meets at the top and then reinforced with a steel plate welded to the base (lid) inbetween the spirals for strength. This serves as the lid and bolts on either side to lock it all together - the clay blocks* are built up in the centre to the top and will highlight the house number No.11.
* (the clay blocks will be the dry Cream Glaze as the totem sculpture with the three shell spirals in my previous post)
A few minor changes to my design - angle steel replaces the reo for added strength and to protect the clay edges. Four brackets instead of two, to secure at the base. The bolts on the lid had to be reconsidered and put to the side so the internal plates for securing were not in the way of the clay being placed within. Overall the sculpture is shaping up like my design (which of course was not to scale, I might add).
Next post will be on the clay component - so I best get into the studio and get on with it!