1. How is ductwork location affected by solid wood floor joists?
2.Why do contractors often favor a trussed roof system?
3. Name four common types of insulation used in residential construction
Why is plywood decking offset, as seen in Figure 67-20b ?
![1946_07c35683-118c-4d9f-b17a-17b607d78f45.png](https://secure.tutorsglobe.com/CMSImages/1946_07c35683-118c-4d9f-b17a-17b607d78f45.png)