Structural calculatorsfor timber.
Four free calculators for the preliminary sizing of beams, floors and roofs in glulam and X-LAM panels. Calculate online, download the PDF and share the link with your team.
01
Simply supported glulam beam
02
Glulam floor
03
Pitched timber roof
04
X-LAM panel floor
Simply supported glulam beam
Span, spacing and loads: we estimate the minimum depth of the glulam beam (GL24h – GL32h), checking bending, shear and deflection to NTC 2018 or Eurocode 5.
Estimated section
16 × 52 cm
GL24h · final deflection 36,9 mm
Beam list and length optimisation
Enter the beams you need, even of different lengths: we calculate the total volume and how to cut them together from standard 12.00 and 13.50 m beams with minimum waste.
No length entered: we use the span. Add bearings or overhangs for an accurate list.
Columns Quantity and Length (in m, or in mm/cm if stated in the header). Identical lengths are merged; uploading replaces the current rows.
Total volume
0,832 m³
1 beams · 16 × 52 cm
To order
1 × standard beams
12,00 m · 0,998 m³ · waste 2,00 m (16,7%)
- 1 × 12,00 m → 10,00 m · waste 2,00 m
Every cut takes 1 cm, including trimming at both ends of the standard beam: one standard beam gives at most 13.48 m. 12.00 and 13.50 m beams are combined to order as few metres as possible.
Preliminary estimate, it does not replace the structural calculation by a qualified engineer. Assumptions: member simply supported and restrained against lateral-torsional buckling, medium-term loads (kmod 0.8), self weight 510 kg/m³, ULS combination 1,30·G + 1,5·Q, γM 1,45, depths in 4 cm steps. Roofs: snow qs = μ1·qsk (CE = Ct = 1), span measured on plan, permanent loads on the slope.
Glulam floor
Choose the NTC 2018 use category: we calculate the variable loads and the section of the floor beams, with strength and deflection checks.
Estimated section
16 × 52 cm
GL24h · final deflection 37,2 mm
Beam list and length optimisation
Enter the beams you need, even of different lengths: we calculate the total volume and how to cut them together from standard 12.00 and 13.50 m beams with minimum waste.
No length entered: we use the span. Add bearings or overhangs for an accurate list.
Columns Quantity and Length (in m, or in mm/cm if stated in the header). Identical lengths are merged; uploading replaces the current rows.
Total volume
0,832 m³
1 beams · 16 × 52 cm
To order
1 × standard beams
12,00 m · 0,998 m³ · waste 2,00 m (16,7%)
- 1 × 12,00 m → 10,00 m · waste 2,00 m
Every cut takes 1 cm, including trimming at both ends of the standard beam: one standard beam gives at most 13.48 m. 12.00 and 13.50 m beams are combined to order as few metres as possible.
Preliminary estimate, it does not replace the structural calculation by a qualified engineer. Assumptions: member simply supported and restrained against lateral-torsional buckling, medium-term loads (kmod 0.8), self weight 510 kg/m³, ULS combination 1,30·G + 1,5·Q, γM 1,45, depths in 4 cm steps. Roofs: snow qs = μ1·qsk (CE = Ct = 1), span measured on plan, permanent loads on the slope.
Pitched timber roof
Pitch, zone and altitude: we calculate the snow load to NTC 2018 and the section of the glulam roof beams.
Snow load on the roof: 82 kg/m²
Estimated section
16 × 48 cm
GL24h · final deflection 41,7 mm
Beam list and length optimisation
Enter the beams you need, even of different lengths: we calculate the total volume and how to cut them together from standard 12.00 and 13.50 m beams with minimum waste.
No length entered: we use the span. Add bearings or overhangs for an accurate list.
Columns Quantity and Length (in m, or in mm/cm if stated in the header). Identical lengths are merged; uploading replaces the current rows.
Total volume
0,768 m³
1 beams · 16 × 48 cm
To order
1 × standard beams
12,00 m · 0,922 m³ · waste 2,00 m (16,7%)
- 1 × 12,00 m → 10,00 m · waste 2,00 m
Every cut takes 1 cm, including trimming at both ends of the standard beam: one standard beam gives at most 13.48 m. 12.00 and 13.50 m beams are combined to order as few metres as possible.
Preliminary estimate, it does not replace the structural calculation by a qualified engineer. Assumptions: member simply supported and restrained against lateral-torsional buckling, medium-term loads (kmod 0.8), self weight 510 kg/m³, ULS combination 1,30·G + 1,5·Q, γM 1,45, depths in 4 cm steps. Roofs: snow qs = μ1·qsk (CE = Ct = 1), span measured on plan, permanent loads on the slope.
X-LAM panel floor
Span and use category: we estimate the X-LAM (CLT) panel thickness with the gamma method, checking rolling shear and deflections.
Recommended panel
165 mm
5 layers · 33L-33T-33L-33T-33L · C24 · final deflection 19,4 mm
Preliminary estimate, it does not replace the structural calculation by a qualified engineer. Assumptions: member simply supported and restrained against lateral-torsional buckling, medium-term loads (kmod 0.8), self weight 510 kg/m³, ULS combination 1,30·G + 1,5·Q, γM 1,45, depths in 4 cm steps. Roofs: snow qs = μ1·qsk (CE = Ct = 1), span measured on plan, permanent loads on the slope. X-LAM floor: 1 m strip simply supported, EMMA INDUSTRIE panels and C24 values, gamma method with rolling shear of the transverse layers, kdef 0.8 / 1.0. Vibrations and fire resistance not checked.
FAQ
Frequently asked questions about the calculators
Why trust us
Figures, certifications and public works that speak for us.
- 1905
- Year founded
- 944
- Structures built
- 9.000 m³
- Timber processed every year
- CE0407-CPR-1459
- ISO 9001n. 3919760
- PEFCCSQA-PEFC-COC-54966
- STCAttestato 22/22-CL
Let's buildsomething that lasts.
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