Adding microscopic air bubbles to concrete is sometimes intentionally done for benefits on some concrete projects.
Indicate whether the statement is true or false
Question 2
Given the following choices, one end or the other of a valley jack rafter connects to a ________ or a ________.
A) Ridge board, top plate B) Valley rafter, ridge board
C) Ridge board, hip rafter D) Cripple jack rafter, ridge board