Open String Stairs A staircase where at least one end of the treads is visible. The period that a product can remain open to the air without impairing its usability. Examples to products with limited open times include paint, adhesive, and joint compound. Some products can be salvaged after they have exposure has exceeded the open time while others are ruined. A style of roofing where valley flashing is left uncovered by shingles.
Water flows from the shingles to the valley and is directed off the roof.
A metal joist where the edges are reinforced by a lightweight structural steel in a zigzag pattern, creating a strong yet lightweight framing member. Opening Escrow The deposit given by a buyer of property is delivered to the escrow agent, who retains it for the seller. Operating Expense Ratio Mathematical equation obtained by dividing operating expenses by gross income. Operating Expenses Amounts paid to maintain property, such as property taxes, utilities, hazard insurance, repairs, maintenance, legal, management fees, etc. Operating Lease Regular rental of property between the lessee and lessor for a fee.