Combinations      

    Doublejamb connection


doublejamb as support

Doublejambs, tied knots, transitional cane, purlin with cleat. The second pole is replaced by a cleat. Advantage is that the wall of the cane is not weakened by bores. There is no reinforcement of the polebase.

Doublejambs: The roof and floor-loads are absorbed by different poles. Hereby damaged canes can be exchanged more easily. The rot endangered polezone is reinforced.

doublejamb with support

doublejamb with support.

Doublejamb with support. tied knots, transitional cane, purlin with cleat. The second pole is replaced by a cleat.


   ZERI Pavilion EXPO 2ooo

ZERI Pavilion EXPO 2ooo

A similar connection was used for the ZERI pavilion at EXPO 2ooo. To guaranteeing tensile strength, there are used two different types of connections:

sheded threadrods - Type A

For this connection the bamboo needs to be drilled. The threadrods are sticked into the holes. In these internodias, where the threadrods are in, the bamboo is filled with mortar. With the ends of the threadrods you can creat different kinds of connections. For the connections it is important to use special dishes, also to fill the bamboo with mortar. Otherwise the bamboo would splitter, because of the force transmission at only one point.

lateral steel flanges and sheded bolts - Type B

This connection is similar to type A. The bamboo is drilled. The sheded bolts are insert into the bamboo in crossdirection, the bamboo is filled with mortar. The connection itself is constructed by a lateral steel flanges, that is tied around the bamboo and joint with the sheded bolts. This connection transmits the forces to different parts of the bamboo and avoids the debit of only one point of the bamboo.

  

    Cane bundles


structural element composed of three canes

Cane bundles must be used for bigger loads. When using them for construction a possible connection can be achieved by projeting steel tips out of a wood cylinder (see interlocking connection), so that these tips can be welded to a plate or any other cetral component, to fix the relative position of the canes.

structural element composed of four canes

Probably it will be necessary to keep the canes together at midspan. A steel band can be used for that.

Information: Fundamentals of the Design of Bamboo Structures