Hello I am trying to solve this loads and reactive forces problem 1.7.  I'm having a difficult time understanding how the distributed load is for I2 = 3ft and I3= 1 ft where did they get 3ft and 1 ft. I understand how they got I1= 7ft  with a beam spaning 14 ft divide 2 = 7ft and I wondering where they got these two answer for I2 = 3ft and I3= 1 ft ?

Consider the same beam as in Problem 1. It carries a live load of 3 kips/ft. 8" 8" V (kips) wl M (kips) 9 w/² 128 6" 6 #6 7.5 ft. 7.5 ft. A WL =3 kips/ft. 1 =20 ft. 6 #9 500 8 5 ft. B wl 8 -W/2 B

duty. the information

Estimate the loads applied on the Beam 1, including the load transferred from Slabs 1 and 2 (self-weight of slabs), the self-weight of Beam 1 and the water tank load. Note that the water tank load may be idealised as a point load. Please also note that there are also other types of loads, which should be considered for practical design, but for simplicity they are not considered here.