Aluminum formwork girder

Overview
Aluminium formwork beams designed for high load capacity with low self-weight and long service life. Available as the Alu box beam (compact cross-section) and the Doka aluminium beam 20 (20 cm height) for material-optimised use on construction sites.

Alu box beam
Lightweight aluminium beam offering high bending and shear capacity for optimized spans and fewer supporting elements.

• Innovative beam cross-section delivering high moment resistance
• Reduces number of items required on site
• Durable manufacturing for multiple reuses

Technical specifications (Alu box beam)

• Moment (M): 16.8 kNm
• Shear force (Q): 27.3 kN
• Rigidity (E x I): 729 kNm²
• Weight per linear meter: 6.3 kg (without nailing insert); 7.5 kg (with nailing insert)
• Overall height: 17.5 cm

Doka aluminium beam 20
20 cm aluminium beam combining high load-bearing capacity with easy handling and system compatibility.

• High load capacity for reduced primary beam count in fully loaded towers
• Lightweight construction for easier positioning and transport
• Compatible with Doka components and safety systems

Technical specifications (Doka aluminium beam 20)

• Moment (M): 18.4 kNm
• Shear force (Q): 50.0 kN
• Rigidity (E x J): 849.9 kNm²
• Weight: 6.4 kg/lin.m
• Height: 20.0 cm

Cost reduction
Fewer elements and optimized logistics reduce total project cost:

• Up to one-third fewer floor props for slabs due to wider beam spans
• Up to 50% fewer primary beams in fully loaded load-bearing towers
• Lower transport and handling costs from reduced item counts

Long service life
High-quality manufacture and wear-resistant aluminium extend usable life:

• High number of repeat uses
• Continuous fixing slot prevents local damage
• Integrated high-grade plastic nailing strip for quick fixing of formwork sheets

Easy handling & Safety

• Low weight enables faster, less energy-intensive on-site work (e.g. ~6.4 kg/m for Alu 20)
• Stable mechanical properties despite moisture, rain and UV exposure
• Compatibility with Doka safety systems (edge protection, etc.) improves workplace safety

Technical data / specifications

• Models described: Alu box beam; Doka aluminium beam 20
• Alu box beam — M: 16.8 kNm; Q: 27.3 kN; E x I: 729 kNm²; Weight: 6.3 / 7.5 kg/m; Height: 17.5 cm
• Doka aluminium beam 20 — M: 18.4 kNm; Q: 50.0 kN; E x J: 849.9 kNm²; Weight: 6.4 kg/m; Height: 20.0 cm
• Design options: integrated nailing strip, continuous fixing slot