Tongue and groove boards with spacers permitting expansion, and

Details Tongue and groove boards with spacers permitting expansion, and Tongue and groove boards with spacers permitting expansion, and

1980-03-28

1982-07-06

Murtagh, John E.

Static structures (e.g., buildings)

Including design feature accommodating dimensional variation...

52595, E04C 130

Patent

active

043376070

ABSTRACT:
Tongue and groove boards are provided with integral spacers that permit expansion of the assembled boards without buckling, by milling on the bottom of the groove a central longitudinally extending rib of triangular cross section. Spaced portions of the rib, of total length that is most of the length of the board, are then compressed to the level of the bottom of the groove, thereby leaving a series of relatively weak projections which serve to space the boards apart the necessary distance during assembly, but which are not strong enough to resist compression upon expansion of the boards under the influence of moisture or temperature.

REFERENCES:
patent: 158998 (1875-01-01), Sturevant
patent: 2004193 (1935-06-01), Cherry
patent: 2111003 (1938-03-01), Petty
patent: 3566542 (1971-03-01), Gillen
patent: 3987599 (1976-10-01), Hines
patent: 4095913 (1978-06-01), Pettersson
patent: 4265067 (1981-05-01), Palmer

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