The Janka Hardness Scale rates the hardness of hardwood flooring and bamboo as well. You can read more about the Janka Scale and see a list of the Janka Hardness Ratings from FindAnyFloor here http://www.findanyfloor.com/hardwood/JankaHardnessRatings.xhtml
According to the Janka Hardness Scale Acacia rates at 1750 lbs in a sq inch.
European Oak in many ways in similar on the Janka scale as Ameriacan Oak at 1360.
Poplar has a rating of 540.
910.
One can buy rubberwood online on different websites. Some of the useful websites for purchase of rubberwood are Lumber Jocks, Garden Web and Rubberwood Products.
http://surfpick.com/hardness/ This has all the answers
White Oak is 1360 Northern Red Oak is 1290
Rubberwood is as good a material for making furniture as regular wood. Rubberwood is imported from the Far East, and after it has been kiln dried, it resists absorbing water.
700kg/m3
We've got the chart on our website, www.carpetexpress.com Or just click the link in the related links below.The complete Janka Wood Hardness Scale is on www.morlanwoodgifts.com website. It has 2,166 woods listed alphabetically by common trade name, over 1,500 different botanical/scientific names plus the world's top 125 known softest woods listed in order of softness and the world's top 125 known hardest woods listed in order of hardness. Just click on the link below, Complete Janka Wood Hardness Scale.
Janka Bryl died in 2006.