Clicking any heading in the main data area (at right) will scroll the page back to this top position. Use the following links to jump to the associated section in the main data. Boring Comments Common Names Common Uses Countries of Distribution Cutting Resistance Drying Defects Ease of Drying Family Name Grain Heartwood Color Kiln Drying Rate Kiln Schedules Luster Nailing Natural Durability Numerical Data Planing Polishing References Regions of Distribution Resistance to Impregnation Response to Hand Tools Sanding Sapwood Color Scientific Name Screwing Staining Strength Properties Texture Toxicity Trade Name Tree Identification Tree Size Turning		Scientific Name Sterculia rugosa Trade Name Maho Family Name Sterculiaceae Common Names Maho, Sterculia, Yahu Regions of Distribution Latin America Countries of Distribution  [VIEW MAP] Guyana Common Uses Boxes and crates, Coffins, Concrete formwork, Light construction, Paneling, Pulp/Paper products Heartwood Color Black Brown Purple White to cream Greenish to greyish Brown Sapwood Color White Yellow Same as heartwood Grain Straight Even Figure Rays (figure) Straight Rays figure Texture Fine Medium Medium to coarse Coarse Luster Medium Low Slightly lustrous Natural Durability Very durable Durable Resistant to termites Non-resistant to marine borers Non-resistant to powder post beetles Susceptible to insect attack Susceptible to marine borer attack Susceptible to attack from termites (Isoptera) Perishable Non durable Toxicity Some toxic effects Kiln Schedules UK=A US=T2D4/T2D3 Fr=1 Drying (speed) is fast Drying Defects Distortion Checking Splitting Moderate twist/warp Ease of Drying Moderately Difficult to Difficult Fairly Easy Rapidly Moderate Difficult Kiln Drying Rate Naturally dries quickly Tree Identification Bole/stem form is not buttressed Bole/stem form is cylindrical Tree Size Tree height is 20-30 m Bole length is 10-20 m Bole length is 0-10 m Sapwood width is 0-5 cm Tree height is 10-20 m Tree height is 30-40 m Bole length is 20-30 m Comments General finishing qualities are rated as satisfactory Boring Fairly easy to very easy Cutting Resistance Fairly Difficult to Very Difficult to saw Nailing Pre-Boring Recommended Fairly Difficult to Very Difficult Holds nails well Easy to nail Planing Very Good to Excellent Results Fair to Good Results Resistance to Impregnation Resistant heartwood Resistant sapwood Response to Hand Tools Fairly Difficult to Difficult to Work Easy to machine Sanding Good sanding finish Screwing Pre-boring recommended Turning Fair to Good Results Very Good to Excellent Results Polishing Fair to Good Results Very Good to Excellent Results Satisfactory results Good results Staining Finish is generally satisfactory Finish is generally good Strength Properties Density (dry weight) = 31-37 lbs/cu. ft. Numerical Data Item Green Dry English Density 32 lbs/ft3 Weight 31 25 lbs/ft3 Item Green Dry Metric Density 512 kg/m3 References Brown, W.H.,1978,Timbers of the World, No. 2 South America,TRADA, Red Booklet Series Fanshawe, D.B.,1954,Forest Products of British Guiana Part 1 Principal Timbers,Forest Department British Guiana Forestry Bulletin (New Series 2nd,Edition,No.1 Longwood, F.R.,1962,Commercial Timbers of the Caribbean,U.S.A. Department of Agriculture, Agriculture Handbook,No.207