What Is Iatandza Wood?
Iatandza refers to timber harvested from several African species in the genus Albizia, primarily Albizia angolensis, Albizia antunesiana, Albizia ferruginea, Albizia glaberrima, Albizia versicolor, and related Albizia p.p. Originating across central and western African nations including Cameroon, Côte d’Ivoire, Ghana, and Nigeria, it is also known under the trade name West African albizia. In international trade regulations, this timber is not listed in the CITES Appendices (Washington Convention 2025).
Documented in the CIRAD Tropix 7 technical sheets, Iatandza presents a warm red-brown appearance. The heartwood ranges from yellow-brown to dark red-brown, often displaying distinctive golden glints. The sapwood is clearly demarcated from the heartwood with an average thickness between 3 to 6 cm. Log diameters typically range from 60 to 90 cm, yielding medium-to-wide boards and live-edge slabs suitable for tabletop projects.
Physical Properties and Epoxy Table Stability
When selecting timber for an epoxy river table, movement characteristics dictate how the wood interfaces with cured resin over seasonal humidity cycles. Iatandza exhibits modest dimensional movement. Its total tangential shrinkage is 4.9% and total radial shrinkage is 2.8%, yielding an St/Sr ratio of 1.8. An St/Sr ratio below 2.0 indicates a relatively low tendency to cup or twist as moisture shifts. Additionally, its coefficient of volumetric shrinkage is 0.43% per 1% change in moisture content, with a fiber saturation point of 24%.
In terms of weight, Iatandza sits at a specific gravity of 0.60 at 12% moisture content (about 37.5 lb/ft³). For river table planning, this means a 2-inch-thick slab weighs approximately 6.2 lb per square foot, providing sufficient mass for sturdy dining tables without becoming unmanageable during assembly.
Mechanical resistance is measured on the French Monnin scale, where Iatandza scores a 3.4 at 12% moisture content. The Monnin scale is an established French indentation index where higher numbers reflect harder timber; it must not be confused with or converted into a Janka rating. At 3.4, Iatandza possesses moderate surface hardness suitable for daily indoor use. Its mechanical profile also includes a crushing strength of 50 MPa (about 7,250 psi), a static bending strength of 81 MPa (about 11,750 psi), and a modulus of elasticity of 13,000 MPa (about 1,885,000 psi).
| Property | CIRAD Tropix value | What it means / US units |
|---|---|---|
| Botanical name(s) | Albizia angolensis, Albizia antunesiana, Albizia ferruginea, Albizia glaberrima, Albizia versicolor, Albizia p.p. | |
| Other trade names | West african albizia | |
| Colour / texture / grain | Red brown; texture coarse; grain interlocked; interlocked grain slight | |
| Specific gravity (12% MC) | 0.60 | about 37.5 lb/ft³; a 2-inch-thick slab weighs about 6.2 lb per sq ft |
| Monnin hardness (12% MC) | 3.4 | French hardness scale; higher = harder (not a Janka value) |
| Total tangential shrinkage | 4.9 % | green to oven-dry |
| Total radial shrinkage | 2.8 % | green to oven-dry |
| Ratio St/Sr | 1.8 | closer to 1 = less cupping tendency |
| Coefficient of volumetric shrinkage | 0.43 % per % MC | volume change per 1% change in moisture content |
| Fibre saturation point | 24 % | |
| Thermal conductivity | 0.20 W/(m·K) | |
| Crushing strength (12% MC) | 50 MPa | about 7,250 psi |
| Static bending strength (12% MC) | 81 MPa | about 11,750 psi |
| Modulus of elasticity (12% MC) | 13,000 MPa | about 1,885,000 psi |
| Decay (fungi) resistance | Durability class 2 – durable | |
| Termite resistance | Class D – durable | |
| Dry-wood borer resistance | Class D – durable (sapwood demarcated, risk limited | |
| Heartwood treatability | Class 3 – poorly permeable | |
| Use class from natural durability | Class 3 – not in ground contact, outside | |
| Drying | rate slow; distortion: slight risk; checking: slight risk; collapse: no known specific risk; casehardening: no known specific risk | |
| Suggested kiln program temperatures | 53–62 °C | about 127–144 °F |
| Machining | blunting normal; saw teeth: ordinary or alloy steel; cutting tools: ordinary | |
| Nailing and screwing | Good but pre-boring necessary | |
| CITES status | This species is not listed in the CITES Appendices (Washington Convention 2025). |
Values from the CIRAD Tropix technical sheet (average values for mature wood, 12% moisture content where noted). US-unit conversions are calculated by BigEpoxy (1 MPa = 145.04 psi; density = specific gravity × 62.43 lb/ft³).
Pros and Cons of Iatandza for River Tables
Pros
- Balanced shrinkage profile: Low total shrinkage numbers (4.9% tangential, 2.8% radial) and an St/Sr ratio of 1.8 minimize stress along the epoxy-wood bondline.
- Natural resistance: Rated as Durability Class 2 (durable) against decay fungi, Class D (durable) against termites, and Class D against dry-wood borers.
- Standard tool requirements: Causes normal tool blunting and can be cut using ordinary or alloy steel tooling without requiring specialized carbide setups.
- Distinctive aesthetics: Red-brown heartwood with yellow-brown tones and golden glints offers strong visual contrast against tinted or clear casting resins.
- Proven furniture performance: Documented end-uses include cabinetwork (high-class furniture), current furniture, sliced veneer, flooring, and interior joinery.
Cons
- Slow drying cycle: CIRAD reports a slow drying rate, requiring careful moisture monitoring prior to casting.
- Interlocked grain distortion: Grain is naturally interlocked, and sections with highly interlocked grain present an elevated risk of distortion.
- Pore filling required: Due to its coarse texture, CIRAD notes that filling is necessary to achieve a smooth, high-quality finish.
- Fastener splitting: Tends to split during assembly; pre-boring is necessary when securing table bases or mechanical hardware.
- Irritant dust: CIRAD notes that the sawdust produced during machining and sanding is an irritant.
Fabrication and Build Notes
Slab Selection and Inspection
When picking Iatandza slabs, check the grain orientation carefully. While general interlocked grain is slight, local sections can feature highly interlocked grain. These areas carry a heightened risk of distortion. Because sapwood is clearly demarcated and spans 3 to 6 cm, builders incorporating a live edge must evaluate the transition line. CIRAD notes that dry-wood borer risk is limited to the sapwood, while the heartwood remains durable (Class D).
Drying Considerations
Never cast resin against boards that have not fully equilibrated. Iatandza dries at a slow rate. CIRAD identifies a slight risk of checking and slight risk of distortion, but reports no known specific risk of casehardening or collapse. For kiln operations, suggested program temperatures run between 53 °C and 62 °C (about 127 °F to 144 °F). Ensure moisture content matches interior targets before surfacing.
Machining and Prep
Working Iatandza is straightforward. Blunting effect on cutting edges is normal, and ordinary steel or alloy steel blades perform reliably. Because CIRAD highlights that the species produces an irritant sawdust, run adequate dust collection and personal respiratory protection when surfacing, routing, and sanding. For base attachment, always pre-bore screw holes to counter its documented tendency to split.
Sealing, Pouring, and Finishing
Because Iatandza has a coarse texture, deep open pores can trap air and release micro-bubbles into liquid casting resin during exothermic curing. Apply a thorough seal coat across all live edges and flat surfaces before executing the main epoxy pour, following your resin manufacturer’s technical data sheet. When applying the topcoat across the cured wood-and-epoxy assembly, heed CIRAD’s explicit guidance: filling is necessary to obtain a good finish. Using grain filler or multiple build coats ensures an even, glass-smooth surface across the coarse grain.
Sources
Published October 30, 2026. Sources are linked in the text.
Header image: original graphic by BigEpoxy.com.
Staff note: Heartwood treatability for Iatandza is rated as Class 3 (poorly permeable), so rely on surface encapsulation and mechanical keying rather than expecting deep chemical penetration along the slab edges. (Source: CIRAD Tropix 7 technical sheet: Iatandza.)