• I was wondering the same thing. I had a few building systems calculations on PPD, but i'm not sure what to expect for PDD. The Ballast 5.0 study guide does not have much for building systems in the PDD section, but I am going through and studying things like heat gain, degree day calcs, duct sizing, lighting calcs, water pressure, noise reduction/sound transmission, etc. Not sure if any of that will be on PDD, but I believe those fall into NCARB's guidelines for this exam. Hopefully someone who has taken PDD will chime in!

• Kyle,

With the calculations you had in PPD, were you able to reference formulas given to you on the exam to plug numbers in or were you expected to know the formulas/equations? It seems that NCARB has given some good reference material to use on the exam so I'm hoping this is the case!

And thanks for responding to my original post! I hope more people can chime in too.

•

Hi Alicia,

Kyle's comments are spot on - just like with structures, the calculations you might make related to mechanical, plumbing, acoustics, lighting, and other systems will vary by division.  PDD is about integrating systems and detailed decisions about sizing - this is especially described in Section 1.  There are references available to you during the exam - check the References tab in the demo exam so you'll know what to expect at the test center.

• As far as Ballast 5.0 goes, a lot of the PPD content related to building systems & construction systems should still apply to PDD. The nice thing to understand for the new exams is that each question is worth 1 point. You get the same number of points for being able to point to the spot flashing goes at the base of a wall as you do for answering the axial force on a truss member. Although it would be nice to answer every question correctly, some things just aren't worth the limited study time for.

The other thing I would say is get comfortable with figuring out area costs. "Simple" math but it can be easy to get tripped up converting units and percentages. Usually multi-step problems but all the information is there for you which is nice.

• I would also add to spend time getting to know what equations are provided to you for use during the exam.... only so you can spend time memorizing the ones that are not. The few questions I had that required calculations feel into 2 categories - simple math questions and questions that required a formula not provided by NCARB. I found I used the provided reference materials for exactly 0 questions.

• This is a pretty old thread, but I'm hoping someone can help me out. I'm looking for study materials for duct sizing. I've been able to locate charts and guides online, but I'm really practice exam questions. Seeing the actual numbers plugged into the formulas and how that applies to the chart(s) would be really helpful. Has anyone come across anything like this?

• did you try arch studio companion? it is great for both structures and hvac sizing...at least for general ideas.

• Yes, ASC includes general overall sizing for hvac units, but nothing specifically for duct sizing....unless I missed something?