We walked the engineer through the project with our digital 3D model. This was especially helpful in explaining the desired roof system and concerns about the structural integrity of the trusses. This was a lesson in sticking to your guns and how easily the design will be pulled from under your feet if you aren’t quick and able to convincingly defend your work. There was a moment when the roof monitor was almost eliminated but we were able to explain the need for extra ventilation in the classroom, research, and living spaces. We submitted the pictured plan and truss elevation to the engineer who will ultimately create his own set of drawings, make suggestions for additional structural support for the truss system, and most importantly, take legal responsibility for the designs.

Here are the answers to the questions we had:
Q: In what direction are prevailing winds?
A: Northwest, Southwest
Q: What is the minimum overhang we need to have for both the roof monitor and roof to keep out rain?
A: 40 cm for the roof monitor, 1m is plenty for the roof.
Q: Can/Should we tie down roof tiles?
A: Once the tiles are placed down, they are fixed, so no, an additional tie down is not needed.
Q: Do we need to connect the roof monitor overhang with a cable?
A: No. The vertical member in the design should be sufficient.
Q: What are the standard dimensions of wood?
A: 10cm by 20cm by 4m
Q: Will we be able to (easily) get wood long enough for the collar tie?
A: Yes, no problem.
Q: What are other standard (and most economical) building materials?
A: Much of the building will be cast in place concrete.
Q: What are the accessibility requirements for the WC, and otherwise?
A: We will draw that in.
Q: Can you sign off on the projects in phases (specifically so that we can pour the foundation ASAP?)
A: Everything will be signed off on tomorrow once we present you the final printed design document.