DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The stillages according to the present invention may be used for the stacking or transport of containers, especially drums containing hazardous waste, such as radioactive intermediate level waste material.
Referring to FIGS.
1 and 2, a stillage 1 is shown for storing four cylindrical drums 2, indicated in dotted lines in FIG.
2, which contain hazardous material, for example, encapsulated radioactive waste.
The shape of the drums need not be cylindrical and could, for example, be square.
The stillage 1 is fabricated from steel plate which may comprise, for example, a high chrome ferritic steel.
The stillage comprises a rectangular base 3 in the form of a flat square plate having an upper surface 4, a lower surface 5 and four sides 6.
Typically, the base 3 may have a thickness of 6.
5 mm.
Extending upwardly and perpendicularly from the base 3 and welded to the upper surface 4 at each corner thereof are four supporting posts 7, 8, 9, 10.
As best seen in FIGS.
3 and 4, each post is a hollow, flat-sided structure of triangular cross section and formed by bending a single plate.
The post 7 has two outer planar walls 11, 12, each lying in a plane parallel to an adjacent side 6 of the base 3.
Each of the outer walls 11, 12 is bent inwardly to form an inner wall 13, each inwardly bent portion forming an angle of 45.
degree.
with respect to an adjacent outer wall 11, 12.
An elongate strip 14 is welded to the inside of the post 7 to cover a gap formed centrally along the inner wall 13.
The strip does not extend right to the base 3 so as to leave a gap which, if desired, allows grout to flow into the post.
Each of the other posts 8, 9, 10 is formed in a similar manner.
Thus, the post 8 has two outer walls 15, 16 and an inner wall 17 provided with a central strip 18.
The post 9 has two outer walls 19, 20 and an inner wall 21 provided with a central strip 22 and the post 10 has two outer walls 23, 24 and an inner wall 25 having a central strip 26.
Welded to the upper end of each post 7, 8, 9, 10 is a flat support pad of a generally triangular shape which substantially conforms to the cross-sectional shape of the posts
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Vibration and Earthquake Isolation 
