Tuesday, December 28, 2010

24m "Howe truss" bamboo bridge model

The bamboo bridge design for 24 meter span from the system developed by Jörg Stamm in Colombia around the end of 90's. It consist of members of 6 meters in length and 12 centimeters in diameter.

Thursday, December 16, 2010

Foundation Work and the Poles After Ten Days

foundation work

The first batch of botong treated for nine days already. Five days to go! the skin turned into maroonish.

Tuesday, December 14, 2010

Concepts of Joint

Radial pattern pins to reinforce inter-node grouting , Trujillo Lopez: 2002 (right)

horizontal connection from Ecobamboo/Stamm (left) and grouting of inter-node from Delgado: 2006 (right)

Fish-mouth joint from deBoer (left), symmetrical connection of poles (center) and a research on axial connection strength from Trujillo: 2009 (right)

Tuesday, December 7, 2010

Bamboo Culture

simple construction using nylon tread

bamboo for boat rig (left) untreated poles easily decayed (right)

kalakat or bamboo weave

bamboo as wall infills

bamboo safe (left) nipa leaves for roofing (right)

Butong from Kinuskusan

These are bamboo poles we bought from Kinuskusan, two-and-a-half hour south of Davao City. It's Dendrocalamus Latiflorus, I think, the locals call it Butong. Poles are relatively straight or smoothly curved, that was the main concern why I decided to get this poles despite that the locals favor tungkan (Bambusa blumeana) for construction.

The culm wall thickness at the bottom is around 2 centimeters.

Nice curve for arch component!

Thickness goes down to 1.5-1 cm 8-9 meter from the bottom.

We'll see what happen to these cuts left untreated.