Questions Of The Week - 10 September 2020 - Time to play Topside!

Welcome to another round of Questions of The Week!

A member of the Awards Committee will post questions, at a random day/time.

Members may make one post per question thread to answer the questions, and the eligible member’s winning entry must have all parts of the questions answered completely in that one post. Editing your one answer post allowed will result in disqualification.

Any disregard to the above and divulging the correct answers or giving hints/references will cause a disqualification.

First correct answers (as judged by the Awards Committee or Poster of the Questions) wins.
Request your choice by emailing fastreply@nachi.org and submit your Mailing address for shipping.

Choose your prize from the following list!:

** $50.00 gift certificate from Inspector Outlet
** Case of books "Now That You’ve had A Home Inspection"
** Seventeen Custom Branded Videos value $50.00 ~ your choice!
https://certifiedmasterinspector.org/video-contest

Good luck!!

These are all questions regarding attic framing in a stick built home.

Q1 - Below is a simple structure side view of a shed roof and below. What are the values of the following for the roof.

Roof Slope and also in Percentage and Degrees

Q2 – The following is a multi-part question.

What is a ridge board and what is its purpose?

What is a ridge beam and what is its purpose?

Name a situation/condition where one of these would be required to be used rather than the other.

Q3 – This is a multi-part question.

In attic/roof framing what is a “continuous tie”? What is an example of a continuous tie?

What is the purpose of a continuous tie.

Q4 – This is a multi-part question.

What is a collar tie and what is its purpose?

What is a rafter tie and what is its purpose?

Q5 – When a common ridge board is used, no collar tie is to be installed on rafters, and the rafters are perpendicular to the joists below then what must be done to account for continuous ties, rafter thrust, and separation of rafters from the ridge board?

Q6 – This image is looking straight up at a common ridge board and rafters. What are wrong with these rafters?

3 Likes

Good questions Manny, that will get everyone thinking.
Thanks for your time.

Nice, Manny!..thanks for doing these.

Q1. Low Roof Slope . 1/10 slope, .10 , 36 degrees.

Q2. Ridge board- non structural support for opposing rafters to set against and connect to. Used with a slope greater than 3/12.

Ridge beam- structural. Supports the ends of the rafters at the ridge. Used with a slope less than 3/13.

Q3. A continuous tie is when the house is tied together using boars with ties and a fasteners and shear walls. This structure allows the load to be dispersed from the roof to the basement. This is useful in a strong wind area to allow movements with out separation.

Q4. A collar tie is a tension tie in the upper third of opposing gable rafters that is intended to resist rafter separation from the ridge beam during periods of unbalanced loads, such as that caused by wind uplift, or unbalanced roof loads from snow.

They help to resist expansive or outward movement of force that is usually accompanied by wall spread or ridge sagging. This may happen due to wind, or snow.

A rafter tie is a tension tie in the lower third of opposing gable rafters that is intended to resist the outward thrust of the rafter under a load. They help keep walls from spreading due to the weight of the roof.

Q5. What must be done when a common ridge board is used you use rafter ties.

Q6. The collar ties should not be used on a common ridge board. The rafters should have rafter ties.

Sent from Mail for Windows 10

1 Like

YEA Manny THANKS for doing these questions!

OH BUMMER! Good try Julie!

Unfortunately we have no winner this week. We will run the questions for another week and all members are eligible to try including you Julie.

Well done Manny, I think some Members might have been too busy and never got around to it.
Let’s see if some will take the challenge next week and good luck to Julie on her second try to get them all right and beat some of these guys that seem to be scared of the challenge. LOL

1 Like

Julie will get them all. :smile:

Good questions Manny, thanks for your time!

HI DAVE!
Are you busy too?

Dave’s a good guy! But that’s why Dave’s not here man! He’s always busy. :crazy_face:

4 Likes

Sorry Dave I couldn’t help that one! :rofl:

LOL!..I remember those daze.

Was it Q1? Or did I totally miss a bunch?

Here’s hoping!!

Oh now if I tell you that would give it away. :wink:

Does this mean it is the same challenge for next week? :astonished:

Julie Erck, CPI
Empowered Home Inspections, LLC


303-501-5621

Oh! I reread the thread and I am definitely going to try again. :+1:

1 Like

Crazy busy! :+1::sunglasses::pray::pray:

Q1. Flat Roof Slope . 1/12 slope, 8.333 percent, 4.76 degrees.

Q2. Ridge board- non structural support for opposing rafters to set against and connect to. Used with a slope greater than 3/12.

Ridge beam- structural. Supports the ends of the rafters at the ridge. Used with a slope less than 3/12.

Q3. A continuous tie is when the house is tied together using boars with ties and fasteners and shear walls. For example a multi story structure would have a continuous tie to allow the load to be dispersed from the roof to the basement. This is useful in a strong wind area to allow movements with out separation.

Q4. A collar tie is a tension tie in the upper third of opposing gable rafters that is intended to resist rafter separation from the ridge beam during periods of unbalanced loads, such as that caused by wind uplift, or unbalanced roof loads from snow.
They help to resist expansive or outward movement of force that is usually accompanied by wall spread or ridge sagging. This may happen due to wind, or snow.

A rafter tie is a tension tie in the lower third of opposing gable rafters that is intended to resist the outward thrust of the rafter under a load. They help keep walls from spreading due to the weight of the roof.

Q5. A mid- span rafter tie can be used when a common ridge board is used.

Q6. The rafters are offset. The collar ties should not be used on a common ridge board. The rafters should have rafter ties.