"Custom Alternative" From FTP Site

Building Section Vignette and Multiple Choice

"Custom Alternative" From FTP Site

Postby madcap3693 » Tue Dec 03, 2013 5:46 pm

Hi All. Here is my first attempt at the "Custom Alternative" from the FTP site. Please review. Here is the program...



Program for C4TUT2W1-Section-Custom Alternate 12/07
The structural system consists of top chord bearing steel joists on masonry
bearing walls with continuous concrete spread footings and a concrete slab on
grade.
1. All ceilings and roofs are flat.
2. Non-bearing corridor and lobby walls have a one-hour (minimum) fireresistance
rating.
3. Exterior and bearing walls have a two-hour (minimum) fire-resistance rating.
4. The top of the Elevator roof deck shall match the height of the Meeting Room.
No finished ceiling is required in this space. The joist height for this space is
16” deep and runs the same direction as the Meeting Room.
5. The ceiling height of the meeting room is 26’-0”. The ceiling height of the first
floor spaces is 9’-0. The ceiling height of the second floor spaces is 8’-6”.
6. The top of slab at the elevator pit must be 4’-0” below the First Floor slab.
7. Ceilings are used as return air plenums. All ceilings are non-rated.
7. Assume fire/smoke dampers and transfer grilles are provided as needed.
8. The space between each ceiling and floor or roof slab must be held to the
minimum dimension required to accommodate light fixtures and the structural
and mechanical components shown on the plans.
9. All ducts are placed below the joists.
10. Provide 8" of clearance between the bottom of all the ducts and the finished
ceiling to accommodate light fixtures.
11. Parapets must extend 2'-8" above the surface of the roof at perimeters and at
changes in the roof deck elevation.
12. The frost depth is 4'-0" below grade.
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madcap3693
 
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Re: "Custom Alternative" From FTP Site

Postby textbook » Wed Dec 04, 2013 9:04 am

Your footings are two different depths for the far left and the far right.
There should be a fire rated wall in there I believe.
The joist height for the elevator shaft should be the same as the two story height, but with 16" joist, although this is drawn confusingly.
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Re: "Custom Alternative" From FTP Site

Postby madcap3693 » Wed Dec 04, 2013 10:35 am

Thanks textbook! I really appreciate you taking a look.

Good catch on the footing that was off and the fire rated wall. The joists for the elevator should match up with meeting room, but the corridor space in between the elevator and two story space would not, correct? Also The joists are drawn differently in the plan compared to the requirements in the program (Plan shows 24" Joists, while the program says they are 16" and run parallel to the meeting room). Which would govern the plan or program?

Also Did I draw the footings correctly for the elevator shaft? Should they be just footing like a typical interior bearing wall?
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