>>>The pricipal physical properties of wood are strenght, hardness,
stiffness, and density. Density is gereally an indication of the mechanical
properties, inasmuch as dense woods are usally hard and strong; see
Ironwood. The term "strength" covers a number of essentially different
properties, a wood that is high in one kind of strength not necessarily
being high in others. Moreover, the strength varies greatly with the state
of seasoning, or dryness of the wood, and with the direction of the grain;
wood is always much stronger when cut along the grain rather than across it,
and for this reason planks and such articles as poles and handles are always
cut with the grain running the long way. Wood has verh high compression
strength, in some cases higher in proportion to its weight than steel; it
has low tensile strength and moderate shear strength.
High compression strength is required for foundations, and for the main
supports of buildings. Bending strength is essential for most structural
wooden members,including joists,studding, and beams of all sorts. Many woods
which are commonly used for high bending strength have high compresion
strength, and vice versa. Toughness is a measure of strength against sudden
and repeated stress.<<<
During World War II, wood replace many metal parts on aircraft. The
Spruce Goose was made out of wood. The engineer I talked to when the plane
was in Long Beach, told me that "The structure is as strong as if it were
built of steel." Noah would have used the best type of wood for the job and
it has been proven to stable in 200' waves. Now where's the engineer who
said it couldn't be done?
Source: Noah's ark, a multiple view.
This book looked at both sides of the coin and wasn't bias in one way or
another. I found it at the library. It list the types of test done on ark
replicas from the 1600's to today. The verdict?! "The ark, as built
according to the specifications of the Bible, was very stable and had a
surprising ability to point its bow into oncoming waves." That part was
startling to those who conducted the test. What more can I say?!
The documented facts speak for themselves.
Aubrey
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