Glulam GL75-BEECH
Grade
ASTM ANSI/AITC A190.1 · EN 14080
GL75-BEECH = gL75h
Beech-lamination glulam for slender, heavily loaded members and long-span trusses where softwood sections become impractically large.
Values for the GL75-BEECH condition
Other Glulam tempers and conditions
Glulam is listed in 9 conditions; see the grade overview at Glulam.
Compare all 9 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
North American softwood glulam | The standard US/Canadian bending combination (Fb = 24 000 psi allowable-basis, E = 1.8×10⁶ psi) for Douglas fir-larch beams. | — | 8 | 0.8 | — | 0.14 W/m·K |
Combined (layered) softwood glulam, fm,k = 24 MPa | Stronger laminations only in the outer zones — the economical choice for simple bending members loaded about the strong axis. | — | 17 | 0.75 | — | 0.12 W/m·K |
GL24hDefault Homogeneous softwood glulam, fm,k = 24 MPa | The default European strength class: all laminations of the same grade, best when the member is loaded in tension/compression or bending in both directions. | — | 19 | 0.8 | — | 0.13 W/m·K |
Combined (layered) softwood glulam, fm,k = 28 MPa | Most common European beam class: high-grade outer laminations over economical core, optimised for bending. | — | 20 | 0.75 | — | 0.12 W/m·K |
Homogeneous softwood glulam, fm,k = 28 MPa | Higher-graded laminations for more efficient beams and columns where deflection or bending capacity governs. | — | 22 | 0.8 | — | 0.13 W/m·K |
Homogeneous softwood glulam, fm,k = 30 MPa | Premium softwood class for long-span beams and heavily loaded frames where section depth is limited. | — | 24 | 0.8 | — | 0.14 W/m·K |
Homogeneous softwood glulam, fm,k = 32 MPa | Top softwood class from machine-graded high-stiffness laminations; used for the most demanding spans. | — | 26 | 0.8 | — | 0.14 W/m·K |
GL75-BEECHThis page GL75h | Beech-lamination glulam for slender, heavily loaded members and long-span trusses where softwood sections become impractically large. | — | 60 | 0.9 | — | 0.17 W/m·K |
laminated bamboo lumber (GB/T 40247 class) | Moso-bamboo strip laminate used in China for beams, decking and architectural panels; higher density and strength than softwood glulam but more moisture-sensitive. | — | 80 | 1.2 | — | 0.18 W/m·K |
What is Glulam GL75-BEECH?
Glulam GL75-BEECH is Glulam in the GL75-BEECH grade — beech-lamination glulam for slender, heavily loaded members and long-span trusses where softwood sections become impractically large. Glulam GL75-BEECH has a tensile strength of 60 MPa (8.7 ksi), stronger than 66% of natural material grades. Elongation at break is 0.9% and the elastic modulus is 16.7 GPa (2.42 Msi). Glulam GL75-BEECH has a density of 0.73 g/cm³ (0.0264 lb/in³), heavier than 64% of natural material grades. GL24h is the default condition FabDigit quotes; GL75-BEECH is available on request or by drawing note.
Advantages
- Stiff — 16.7 GPa (2.42 Msi), better than 83% of natural material grades
- Conducts heat well — 0.17 W/m·K (0.0982 BTU/hr·ft·°F), better than 76% of natural material grades
Limitations
- Limited service temperature — 50°C (122 °F), worse than 99% of natural material grades
Glulam GL75-BEECH properties
Typical room-temperature values for Glulam GL75-BEECH; 13 are specific to this condition. Other listed values are Glulam reference data and may not represent this condition. Bars are the position among natural material grades.
Physical2
Glulam GL75-BEECH has a density of 0.73 g/cm³ (0.0264 lb/in³), heavier than 64% of natural material grades.
Mechanical10
Glulam GL75-BEECH has a tensile strength of 60 MPa (8.7 ksi), stronger than 66% of natural material grades. Elongation at break is 0.9% and the elastic modulus is 16.7 GPa (2.42 Msi).
Thermal5
Glulam GL75-BEECH is rated for continuous service to 50°C (122 °F). It conducts heat at 0.17 W/m·K (0.0982 BTU/hr·ft·°F), better than 76% of natural material grades. Thermal expansion is 4.5 µm/m·K (2.5 µin/in·°F).
Electrical1
Glulam GL75-BEECH has an electrical resistivity of 5×10⁹ Ω·m.
Chemical & Environmental1
Corrosion resistance is fair (45/100), better than 53% of natural material grades.
Sustainability4
Producing a kilogram of Glulam GL75-BEECH takes about 12 MJ of energy and emits 0.55 kg of CO₂ — more than 69% of natural material grades. Typical recycled content is 2%.
Manufacturability2
Glulam GL75-BEECH's machinability is very good (78/100, worse than 57% of natural material grades).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Glulam GL75-BEECH
Is Glulam easy to machine?
Cuts, drills and CNC-routes readily with carbide tooling; glue lines dull HSS quickly and dust extraction is essential.
Can Glulam be welded?
Not weldable — members are joined with slotted-in steel plates, dowels, screws or glued-in rods per Eurocode 5 / NDS.
Can Glulam be formed, bent or molded?
Curved beams are produced by bending thin laminations (typically t ≤ R/200) over a form and clamping while the adhesive cures under controlled temperature and humidity.
What surface finishes work on Glulam?
Sand, then apply penetrating oil, alkyd/acrylic coating or fire-retardant/preservative treatment; end grain and exposed tops need flashing or capping.
Glulam chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| cellulosesoftwood lamination wood substance | 40 – 47 | 43 |
| hemicellulose | 22 – 30 | 26 |
| lignin | 25 – 32 | 28 |
| extractives/ashresins, terpenes, minerals | 1 – 5 | 2 |
| structural adhesive (MUF/PRF/PUR)glue lines + finger joints, EN 301/EN 15425 Type I | 0.5 – 2.5 | 1.2 |
| moistureEN 14080 requires 6–15 % at gluing | 8 – 15 | 12 |
| wood substance | balance | — |
Glulam GL75-BEECH — frequently asked
What is Glulam GL75-BEECH used for?
Glulam GL75-BEECH is typically used for exposed structural beams, arches/domes, bridges, long-span roofs and columns. In short: long-span structural timber; curved beams to shape; stronger than sawn timber.
What is the tensile strength of Glulam GL75-BEECH?
Glulam GL75-BEECH has a typical tensile strength of 60 MPa (8.7 ksi) — stronger than 66% of natural material grades. Strength varies by condition: see the 9 listed tempers.
Is Glulam GL75-BEECH easy to machine?
Yes — machinability is rated very good (78/100, worse than 57% of natural material grades). Cuts, drills and CNC-routes readily with carbide tooling; glue lines dull HSS quickly and dust extraction is essential.
Can Glulam GL75-BEECH be welded?
Not weldable — members are joined with slotted-in steel plates, dowels, screws or glued-in rods per Eurocode 5 / NDS.
What surface finishes work on Glulam GL75-BEECH?
Sand, then apply penetrating oil, alkyd/acrylic coating or fire-retardant/preservative treatment; end grain and exposed tops need flashing or capping.
Can Glulam GL75-BEECH be formed, bent or molded?
Curved beams are produced by bending thin laminations (typically t ≤ R/200) over a form and clamping while the adhesive cures under controlled temperature and humidity.
What is the maximum service temperature of Glulam GL75-BEECH?
Glulam GL75-BEECH is rated for continuous use to about 50°C (122 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- EN 14080:2013 Timber structures — Glued laminated timber and glued solid timber — CEN (2013)
- ANSI/AITC A190.1 Structural Glued Laminated Timber — APA/AITC (2017)
- Wood Handbook — Wood as an Engineering Material (FPL-GTR-190) — USDA Forest Products Laboratory (2010)
- Eurocode 5 (EN 1995-1-1/1-2) design values and thermal data — CEN (2004)
- Glulam beam technical data (GL24h/GL28c) — Moelven / Binderholz / Pollmeier BauBuche (2023)
- Inventory of Carbon & Energy (ICE) v3 — glulam — Circular Ecology (2019)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.