Is Your Attic Overloaded? Engineers Don't Want You to Know!

How much is too much for an average attic? After explaining roof types and construction terminology, Mike does the calculations and determines how much can put put where.

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Attic Load Capacity at Different Points
Distance from Wall Per Joist Capacity Distributed Capacity (4 Joists)
0 feet 500-600 pounds 2000-2400 pounds
3 Feet 300–400 pounds 1,200–1,600 pounds
5 Feet 200–250 pounds 800–1,000 pounds
7 Feet 200–250 pounds 800–1,000 pounds
10 feet 75–100 pounds 300-400 pounds

Near the wall (within 1–2 feet), the joists could support approximately 50–60 psf
Do not exceed weight:
Excessive deflection (sagging).
Long-term weakening of the joists.
Safety concerns if loads aren’t perfectly distributed.

00:00 Intro
01:05 Terms
01:40 Roof Support
02:12 Roof Anatomy
03:40 Attic Types
04:41 Dead Load
05:28 20psf
06:58 Math
08:53 What?
10:02 How Much Really?
11:19 What Goes Where?
12:19 Conclusion

Mike the Backyard Mechanic (not a real mechanic) works on his cars in his garage (not actually his backyard) and shows how to do repairs and mods, often not correctly, for your entertainment. Mike is not a REAL mechanic, he has common knowledge. Any injury, damage, or loss that may result from improper use of these tools, equipment, or from the information contained in this video is the sole responsibility of the user and not Mike.