• Bamboo Catchfan

Typical Detail of Bamboo Catchfan is illustrated in Figure 3.3.

• Framing

A bamboo catchfan shall be constructed with bamboo framing tied to the building and the scaffold. The supporting bamboo member shall be tied to the standards of both the outer and inner scaffolding layers at the desirable inclined angle extended into the building. The catchfan supports shall be anchored to the

building wall or other structural elements. The spacing between the supporting bamboo members shall be not less than the distance between the standards of the scaffold or not more than

1.3 m whichever is less. The supporting bamboo framing shall be anchored to the building wall or other structural elements with anchor bolts and steel wire ties of adequate strength. The spacing between the anchor shall be not more than 3 m. The supporting bamboo shall have an effective diameter of not less than 40 mm.

• Decking

The Bamboo members which are tied to the supporting members to form the deck of the fan shall have diameter of not less than 40 mm. Bamboo shall be placed across the supporting members at not more than 200 mm centres. Tarpaulin, net and metal sheet or corrugated metal sheet shall be placed on the top of the fan to retain debris. The thickness of the metal sheet shall be 0.5 mm. The tarpaulin, net, and metal sheets shall be securely fastened to the bamboo.