Structural Engineering: RE: Connections between timber batterns/purlins with concrete slab

Hey Conrad,

Thanks for the feedback. I am actually designing golf villas and we want
to give them kind of tropical apperearance especially for the roof. We
will be using timber batterns for fixing slate tiles upon the concrete
slab. For the thatched roof covering, you were right in saying that
bundles be tied with wires and attached to roof battens. They must be
attached in layers and the thatched roof covering must be specially
treated as they are used as roof coverings in most hotels in Mauritius.
A fire retardant coating or paint must also be applied. That hopefully
relieves a little bit our design for the day as far as we are concerned.
Thanks again for replying.

Thanks and Regards,

Murvin Ragaven
(Civil Engineer)
GIBB (Mauritius) Ltd
GIBB HOUSE
71, Sayed Hossen Road
Solferino

Tel : (+ 230) 402 - 1900
Fax: (+ 230) 427 - 6800
Website: www.gibbmauritius.com
Email: mragaven@gibb.intnet.mu

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-----Original Message-----
From: Conrad Harrison [mailto:sch.tectonic@bigpond.com]
Sent: Tuesday, December 11, 2007 9:47 AM
To: seaint@seaint.org
Subject: RE: Connections between timber batterns/purlins with concrete
slab

Murvin

Have a variety of choices for connecting timber to concrete:

1) Chemical or mechanical anchors (refer Hilti, Ramset, and others)
2) Cast in ferrules to take bolts
3) cast in threaded rods
4) Masonry Nails
5) cast in straps or rods.
6) Proprietary fasteners (Miitek gangnail, Pryda, Simpson)

The strength of the timber typically controls the selection of
fasteners.

As for thatched roofing, probably need to look in some old construction
books for techniques. At a guess I would say the bundles are held
together
with wires, and similar wires are used to attach to the roof battens.
The
wires simply being twisted round the battens possibly nailed or stapled
in
place.

Seems like you have a concrete slab roof with a decorative thatched roof
over.

Regards
Conrad Harrison
B.Tech (mfg & mech), MIIE, gradTIEAust
mailto:sch.tectonic@bigpond.com
Adelaide
South Australia

-----Original Message-----
From: Murvin Ragaven [mailto:mragaven@gibb.intnet.mu]
Sent: Tuesday, 11 December 2007 14:57
To: seaint@seaint.org
Subject: Connections between timber batterns/purlins with concrete slab

Hello there,

Please can anyone tell me how is the connection between a timber feature
on a roof and a concrete slab made? I am actually designing such
structures (hotels and villas). Can anybody also suggest how a thatch
roof connection can be made? Thanks for replying though it is a question
for architects and not for us structural engineers

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