Double layerflatdiagonal square pyramidgrids has the advantages of being simple in formation, rational in member stressing and fairly economic of steel cost among square pyramid grids system.
"Fearful of the outcome, King Angus led prayers for deliverance and was rewarded by seeing a cloud formation of a white Saltire - the diagonal cross against which Saint Andrew had been martyred - against a clear blue sky, " writes Mr Reid.
What is more interesting is this final fifth wave is showing a pattern that looks like a wedge-like formation, commonly known in Elliott Wave circles as a diagonal triangle.