Which of the following construction types is considered obst

Which of the following construction types is considered obstructed?

A. Bar joists with 90% open cross sectional area spaced 3 ft on center

B. Wood truss with 78% open cross sectional area spaced 2 ft on center

C. Solid wood joists 9 ft on center

D. Panel Construction with structural elements 15 ft apart in one direction and 14 ft apart in the other direction making panels of 210 sq ft.

E. Combination wood trusses with metal bars as the web members forming a member with an open cross sectional area of 71% and spaced 7 ft on center

What is the answer and where did you find it?

As of to the above data considerations, option D best recommended as the answer.

since the panel construction is not as specific as transparent or grid framed or hollow etc.

As surface area of panel is best reflected as 210sqft(14.5*14.5ft) its a plated surface it 100% blockage for vision on comparision to other.

thank you.

regards.