Page 15 - OHC Hard Woods Tech Guide - 08102017

HARDWOOD

pRopERTIES

Name Ipe Garapa Tigerwood Cumaru

Select Grade, all heart, Select Grade, all heart, Select Grade, all heart, Select Grade, all heart,
Grade
no knots & sap. no knots & sap. no knots & sap. no knots & sap.

No splinters, surface stays No splinters, surface stays No splinters, surface stays No splinters, surface stays
smooth & resists damage, smooth & resists damage, smooth & resists damage, smooth & resists damage,
Appearance sealer required, patinas sealer required, patinas sealer required, colors sealer required, colors
to silver gray with small to gray with small surface darken with age with darken with age with
surface checks. checks. small surface checks. small surface checks.

Moderately Durable
Decay Resistance Very Durable 25+ Years Very Durable 25 Years Very Durable 25 Years
10-15 Years
Fire Rating Class A - B+ A - B A - B A - B
(NFPA)

Resistance to
Termites High Medium High High

Resistance to High Medium High High
Marine Borers

Movement in
Service Low Low Low Low

Average Weight 69 lbs/ft 3 51 lbs/ft 3 57 lbs/ft 3 68 lbs/ft 3

Modulus of Rupture 25,660 lbf/in 2 18,530 lbf/in 2 16,970 lbf/in 2 25,390 lbf/in 2

Modulus of Elasticity 3,200,000 lbf/in 2 2,257,000 lbf/in 2 4,401,000 lbf/in 2 3,237,000 lbf/in 2

Janka Hardness 3,680 lbf 1,650 lbf 2,250 lbf 3,540 lbf

Specific Gravity .91 / 1.10 .65 / .82 .80 / .91 .86 / 1.09
(Basic / 12% MC)

Crushing Strength 13,600 lbf/in 2 9,030 lbf/in 2 10,770 lbf/in 2 13,850 lbf/in 2

Radial: 5.9% Radial: 4.2% Radial: 4.2% Radial: 5.3%
Tangential: 7.2% Tangential: 7.5% Tangential: 7.8% Tangential: 7.7%
Shrinkage
Volumetric: 12.4% Volumetric: 11.4% Volumetric: 11.2% Volumetric: 12.6%
T/R Ratio: 1.2 T/R Ratio: 1.8 T/R Ratio: 1.9 T/R Ratio: 1.5

ohc.net/hardwood-decking

OHC Hard Woods Tech Gd.indd 15 8/10/17 1:32 PM