Final answer:
Wood girders entering exterior masonry of concrete walls should have a 1/2-inch airspace on top, sides, and end to prevent moisture damage and accommodate wood expansion and contraction.
Step-by-step explanation:
The ends of wood girders entering exterior masonry of concrete walls shall be provided with a 1/2-inch airspace on top, sides, and end. This airspace helps to prevent moisture from getting trapped between the wood and the masonry, which can cause rot and structural damage over time. Additionally, the airspace allows for expansion and contraction of the wood due to changes in temperature and humidity.
The ends of wood girders entering exterior masonry or concrete walls should be provided with a one-half-inch airspace on top, sides, and end. This airspace is essential to prevent moisture transfer from the masonry to the wood, which could lead to wood rot or mold growth. In construction, ensuring proper airspace is a key consideration to maintain the integrity and longevity of where materials such as wood and concrete interact, particularly in the context of girder installation.