Hi @Shikha ,
I’m afraid I had to delete the photo as we do not allow posting of screenshots of paid content including Black Spectacles’ exams. However, we are allowed to cite or quote paid content.
The screenshot in question came from a Black Spectacles’ question which was asking what the design load on a pier is. The question states:
“What is the design load on pier B? Use 40 psf for the live load and 10 psf for the dead load. Provide your answer in pounds. Round to the nearest pound.”
The answer rational said,
"The answer is 1600 lbs.
First, find the tributary area supported by the pier. The pier will support the deck halfway to the ledger and halfway to the adjacent piers.
Tributary area: 5’-4"x6’=32 feet.
Add the live load and dead load together to get the design load: 40+10=50psf.
Multiply 50psf by 32 sqft to obtain the answer of 1600 pounds"