Tensile strength of Hickory
Tensile strength of Hickory
(OP)
Could someone please refer me to the tensile strength of American Hickory, parallel to the grain of the wood. I checked www.matweb.com, but only could find values for the tensile strength perpindicular to the grain. If the value cannot be found, how do the strengths differ perpindicular versus parallel to the grain?? Thanks for any help.





RE: Tensile strength of Hickory
http://www.fpl.fs.fed.us/documnts/FPLGTR/fplgtr113/Ch04.pdf
RE: Tensile strength of Hickory
RE: Tensile strength of Hickory
I am not sure why this value is cited so much more than parallel, as it seems that if u were to load the beam in tension, u would try to load it parallel to the grain, so i dont get why they always list perpindicular.
I could take the average ratio of say 10 woods of loading perpinicular vs. parallel, and then try and adjust the figure for hickory to get a ball park figure... what do u think??- drew
RE: Tensile strength of Hickory
RE: Tensile strength of Hickory
This is for pine, not hickory, but it does list tension parallel to the grain: http://www.southernpine.com/designvalues1.htm
This one lists many woods, including Hickory, but NOT tensionat all: http://www.woodbin.com/ref/wood/strength_table.htm
You may be able to use the second reference to compare pine to hickory and get a ballpark tensile value for hickory.
This link lists general properties and has some interesting data, but no numbers: http://www.extension.iastate.edu/Publications/PM329.pdf
This one states that "Due to difficulties in testing and the limited use for such data, tension parallel to the grain has not been extensively measured and/or reported to date." : http://members.cox.net/messman123/Laboratory%20results.htm
RE: Tensile strength of Hickory
Loading any wood PERPENDICULAR to the grain in tension is not a good idea, because (1) the bond between wood fibers is weaker than the strength of the fibers (hence the large difference between parallel and perpendicular design values)(2) as wood dries, cracks may form between the layers of fibers, which reduce the effective cross sectional area.
To quote the NDS(Section 3.8.2 of the 1997 edition):"Designs that induce tension stress perpendicular to grain shall be avoided wherever possible..."
RE: Tensile strength of Hickory
http://www.hardwoodinfo.com/species_guide/display_species.asp?species=hickorypecan#
Tension Perpendicular to Grain (lbf/in2)
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