A 10-ft-long simply supported laminated wood beam consists of eight 1.5-in. by 6-in. planks glued together to form a section 6 in. wide by 12 in. deep. The beam carries a 9-kip concentrated load at midspan. Which point has the largest Q value at section a–a?

point B where  has the largest Q value at section a–a

Explanation:

The missing diagram that is suppose to be attached to this question can be found in the attached file below.

So from the given information ;we are to determine the  point that  has the largest Q value at section a–a

In order to do that; we will work hand in hand with the image attached below.

From the image attached ; we will realize that there are 8 blocks aligned on top on another in the R.H.S of the image with the total of 12 in; meaning that each block contains 1.5 in each.

We also have block partitioned into different point segments . i,e A,B,C, D

For point A ;

Let Q be the moment of the Area A;

SO ;

where ;

For point B ;

Let Q be the moment of the Area B;

SO ;

where ;

For point C ;

Let Q be the moment of the Area C;

SO ;

where ;

For point D ;

Let Q be the moment of the Area D;

SO ;

since there is no area about point D

Area = 0

Thus; from the foregoing ; point B where  has the largest Q value at section a–a

answer:

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