Timber / Hybrid / GL 24h + IPE 240 / GL 24h / S355

Timber-Steel Hybrid Roof — Purlins on Ridge Beam

18m span Primary dimension

GL 24h Section

S355+S350 Steel grade

S. Lindqvist Designer

Gothenburg, SE Location

Sawtooth roof with GL 24h glulam purlins at 1.2m spacing on a primary S355 IPE 240 ridge beam. Span 18m. Cold-formed Z-section secondary purlins in S350GD. EN 1995-1-1 timber design with k_h modification factor for edge beams.

Project highlights

GL 24h glulam purlins, 1.2m centers
IPE 240 ridge beam, 18m span
Cold-formed Z-purlins, S350GD
k_h = 1.10 for edge purlins, EN 1995-1-1 §6.1.6

Eurocode design summary

EN 1995-1-1 §6.1.6GL 24h bending, k_h = 1.10 (edge)

EN 1995-1-1 §6.3.2LTB verification for 18m purlins

EN 1995-1-1 §6.1.7Shear k_cr = 0.67 (glulam)

EN 1993-1-3Cold-formed Z-sections, S350GD, t = 1.5mm

2 downloadable artefacts

DXF — Roof plan + section AutoCAD R12 — plan + section

Download

PDF — Timber calc note EN 1995-1-1 §6.1/§6.3

Download

Calculation overview

Max utilization 82.1%

GL purlin size 80×320 mm

LTB moment M_y,Ed = 42 kNm

Ridge beam shear V_Ed = 88 kN

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