3. You are using two Douglas F-L structural grade built up beams under the said frame, dividing the frame equally. Beams support two floors. Determine the best option (2/5) Table: Span of the beam: Supported joist length: Smallest beam: Total span of the beam: Required span of the beam if the floors are topped with a 50mm concrete: Smallest beam with concrete topping: 3. You want to enlarge a window in the 2nd storey to the maximum width, using 130x304 GLT 20 f lintel over its opening. What is the largest window you could have and what is the total span of those lintels, if the roof span as 8.6m and the eave is 300mm, and the house is in Toronto (2/4) ? Supported length = Snow Load = Table: Maximum width of the opening = Total span of Lintel=