Static structures (e.g. – buildings) – Lapped multiplanar surfacing; e.g. – shingle type – With spacing or space-forming feature
Patent
1985-11-13
1990-02-13
Safavi, Michael
Static structures (e.g., buildings)
Lapped multiplanar surfacing; e.g., shingle type
With spacing or space-forming feature
52535, 52536, 52543, 52544, 52547, E04D 116
Patent
active
048995142
ABSTRACT:
A ballast block is disclosed in the form of a planar plate member. The plate member has a top and bottom surface, front and rear end portions and oppositely disposed lateral edges. The end portions include a mechanism for preventing substantial uplift and rotational displacement of the block when its end portions are interlinked in overlapping relationship with the corresponding end portions of like ballast blocks.
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