Now lets look at load points. 1 type of load points are were the roof load is being concentrated on to wall or post framed areas.
Example a 24’ wide house with standard trusses have a uniform load of 1400# every 2’ on the load bearing walls.
Now if there is a girder on the front of the house to have a gable end look over the front entry. The span is 20’, at each end of the girder is a load point of 7000# (note-a heavy duty pickup truck weights 6000#) we have to solid block this load down to the concrete foundation with the right type of blocking.
Next we have to look at how the floor was constructed. The front foyer of the house is open to the 2nd floor ceiling and it also has a load bearing beam sitting at the same location as the girder truss 9’ above it.
We have an office and a family room in the location where this floor load is.
The office takes up half of this area, knowing this we can calculate the load as follows 17# dead load over the entire floor with a live load of (150# for the office 50# for the family area=) 100# per SF The total load of the floor is117# per SF or 520 SF x 117= 55640#.
This weight is being transferred to the front and back of the house on the back it lands uniformly on a 6” framed wall, no problem. While the front load of 27820# is divided in 1/2 for 2 load points of 13910# + the girder truss load of 7000# which is a total load of 20,910# there is no wood stud that can take that type of load.
But yet builder and building inspectors let the builder get by with just putting studs under the load.
What should have been installed is a steel post rated for that type of load. Then the load must be brought down to the concrete foundation.
Putting wood blocking the floor joist for this type of load will only crush the blocking and it shall fall.