Questions of the week of 8/26/18

:lol:

Yep, sure, ahem, the Twilight Zone is my present address.

In apartments, condos and townhomes fire-resistance-rated wall assemblies are allowed to have a (d)
a. 1’ cantilever
b. 2’ cantilever
c. 3’ cantilever
d. All of the above
e. No cantilever

  1. In a garage to home common wall the fire-resistance-rated wall assembly shall be fitted to a tightness of (1/20”)

a. 1/4”
b. 1/8”
c. 1/16”
d. 1/20”
**
In garages that have access to the attic, a hatch cover made from an approved, fire-rated material should protect this access at all times. Missing or opened covers should be called out, as should covers made from flammable materials, such as thin plywood. Garage attic door must be constructed such that the 45-minute rating is maintained; any drywall edges on both the hatch and the surrounding area exposed to physical damage should be protected. The cover or door should be installed so that it is permanent (non-removable), with latching hardware to maintain it in a closed position. This could be accomplished by the use of spring-loaded hinges, a door closer, or hardware that will not allow it to be left in an open position when not in use. A single bolt-type or hook-and-eye hardware does not provide a positive closure, since these would allow the door to be left open. Likewise, drywall screws are fasteners–not hardware–so they cannot be used as the only means of keeping access doors closed.
The living space should be separated from the garage by a firewall that extends from the floor to the roof. If the ceiling material is fire-rated, the firewall can terminate at the ceiling.
Drywall joints shall be taped or sealed. Joints shall be fitted so that the gap is no more than **1/20" **, with joints backed by either solid wood or another layer of drywall such that the joints are staggered. **

  1. Intumescent Firestop Collars are not allowed to be placed on (e)

a. PVC
b. ABS
c. Both PVC and ABS
d. Ceilings**
e. Intumescent Firestop Collars are allowed on PVC and ABS**
f. Paul made this up to be a trick question and there is no right answer

  1. A door from the garage to the homes interior should have a (Can have 2 or more answers) (a&b)
    **
    a. 1 3/8” minimum solid wood/ wood product core
    b. 1 3/8” solid or honeycombed steel**
    c. 1 ¼” Gypsum filled cavity between steel veneers
    d. A 30 minute rating from the American Fenestration Council
    e. All of the above

look at post #6.

Thanks for your time Paul, good questions.

It is a dimension as vast as space and as timeless as infinity. It is the middle ground between light and shadow, between science and superstition, and it lies between the pit of man’s fears and the summit of his knowledge. This is the dimension of imagination. It is an area which we call the Questions Of The Week. :D:D:D

He got the drywall joint question wrong. Not saying its irrefutable but my source for the gap is the Internachi education area. Internachi says 1/20" gap only, that’s if you don’t tape. Where 1/20" comes from and how you would measure that is beyond my comprehension. Things are strange in the Twilight zone.

1/20", I suppose you would need a metric rule.

Isn’t the correct answers D,D,E and AB?

Never mind I see my mistake.

I agree, I have never seen any drywall jobs done to those parameters. :D;)

Ben Gromicko is the guy to ask where 1/20" comes from. Must be a typo as I thought tight is as good as it gets, who the hell would measure and prove between 1/16 and 1/20"?

Isn’t 1/20" about the width of my trowel?

Which trowel? Actually that makes sense. The drywall guys could use their knife blades to check tightness. Still is kind of odd though.

The one thats 1/20"** thick/thin**.

Of course.:cool:

The factory edge or the butt joints? :smiley:
I have hung a lot of rock…Yep!

I have been taught that a drywall assembly is not rated at all if the drywall is not at least taped. It does not matter how tight the joints are.

You are right Marvin and it does not have a rating unless it is part of a tested assembly and in which case would be taped.
Drywall in itself is a fire resistant material only, but as soon as it becomes part of a tested assembly, it is given an hourly rating or minute rating. :slight_smile:

. Joints shall be taped or sealed. SPS 321.08(1)(a)2.b.** **b. Joints shall be fitted so that the gap is no more than 1 /20-inch with joints backed by either solid wood or another layer of drywall such that the joints are staggered.

Wonder if that is where Ben got the info for that 1/20.?:slight_smile:

What, you guys don’t measure the joint, I always do with my Polish ruler which grades the inch into 20 units. That’s the kind of inspector I am.:mrgreen: