Steel reinforced timber structures

[tngv752]

Hi everyone,

The main rafter and column are HyneBeam 660x85 GL17S (Australian Timber). They are reinforced with 2Y28 (or 3Y28) steel bars at top and bottom and vertical Y28 shear bars where there is a critical moment and shear. I am much appreciate if anyone experienced with it or having any brochures about the composite section can help.

Thanks.

 

[msquared48]

Never heard of the nomenclature or construction.

Mike McCann
McCann Engineering

 

[hokie66]

Suggest you contact Hyne Timber directly with your enquiry. The glulam sections are common, but the steel reinforcing of same is not. I think these bars would have to be built in at the factory, so Hyne should be able to tell you if it is a commercially available system or something experimental.

 

[csd72]

I have specified these types of beams, but a long time ago. It behaves in a fairly similar fashion to a reinforced concrete beam.

Beware that all that steel inside can cause issues with nailing.

I suggest you look up

http://www.hyne.com.au

for details.

csd

 

[tngv752]

The steel reinforced timber structures of the factory were built 10 year ago. They use glulam section 17S (straight). The rafter and column take high bending moment and strengthen by steel Y bars inside the timber. Nowadays, the standard products are GL 17C or 22C (Camber) with the max. cross section is 590x80. I checked in the web site of Hyne company but there's no such thing of steel reinforced timber. I search in the google , still have no luck except that there is something about steel plate reinforced timber (timber beam is strengthened by top and bottom steel plates).

What I know that I can work out the axial force in the steel bar and bond lengths of the bars using the horizontal shear strength for the timber.

I try to contact with Hyne company to get some information anyway.

 

[hokie66]

How do you know that the sections are reinforced? Do you have structural design drawings showing the bars? If so, whose drawings are they? There are several structural engineering firms in Australia who have made a bit of a specialty of designing timber portal frames, and if you can identify the design firm, I would call them.