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StructuralEng, Consultant
Category: Structural Engineering
Satisfied Customers: 6635
Experience:  Structural Engineer
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Information desired: Preliminary estimated size/type of a

Customer Question

Information desired: Preliminary estimated size/type of a clerestory beam for a design shown at this link:
Project Summary: Home renovation, doing preliminary feasibility assessment
Design Details: Beam span (28 feet or 14 feet). 28 feet is the distance from the front of house to back of house (block wall foundation to block wall foundation). A steel beam and supporting columns is located in the basement at the middle distance between the foundation walls -- thus a central supporting column could be added to reduce the unsupported span to 14 feet if that makes the design more practical and would have a direct load path to the steel beam/columns in the basement).
Clerestory Loads Side 1 (low side): 28 feet x 11 feet
Clerestory Beam Loads Side 2 (high side): 28 feet x 23 feet
Building Location: Near Baltimore, MD
Submitted: 5 months ago.
Category: Structural Engineering
Expert:  StructuralEng replied 5 months ago.
Hello. I'll be happy to assist you. Do you want a wood beam or steel beam? I can size this for gravity loading, but you'll also need to consider lateral loading in the final design as this will support the small shearwall segments.
Customer: replied 5 months ago.
I think I'd prefer a wood beam -- Glu-lam more than likely.
Expert:  StructuralEng replied 5 months ago.
I will size it for L/600 deflection. Give me a few minutes to run some numbers.
Expert:  StructuralEng replied 5 months ago.
6.75" x 28.5" glulam 24F-V4 for the full 28' span.
Expert:  StructuralEng replied 5 months ago.
6.75" x 12" glulam 24F-V8 if you put a post at midspan with a full 28' long beam6.75" x 15" glulam 24F-V4 if you put a post at 14' with two 14' long beams.

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