What size beam do I have to have to span 18 feet that is

From https://www.justanswer.com/ythi
JustAnswer Customer: hello.what size beam do I have to have to span 18 feet that is only holding up a 9 X 18 foot exterior balcony with wood veranda coming off if it.
JustAnswer Customer: Currently have 3- 6 X 6 beams holding it up and want to remove the middle one
Pearl Wilson: Assistant: OK.
Pearl Wilson: Assistant: Is there anything else the Structural Engineer should be aware of?
JustAnswer Customer: no can send picture if you like
JustAnswer Customer: added the picture
walkereng: Consultant: I can help.
walkereng: Consultant: I’d like to point out that a Professional Engineer’s standard of care typically includes a site visit to assess field conditions and get an overall understanding of the structure.
walkereng: Consultant: This can obviously not be accomplished through the internet.
walkereng: Consultant: The information provided here is meant for planning purposes only (general sizing and budgeting) and is based on the information provided by you.
walkereng: Consultant: All loading cases considered are for vertical loads only, no lateral analysis has been completed.
walkereng: Consultant: The information should be verified by a professional engineer who can visit the site to ensure that potentially important information has not been overlooked or omitted.
walkereng: Consultant: Hold on, I can run a few numbers for you.
walkereng: Consultant: To clear span 18', in your configuration, you can use the following: 6"x14" Douglas Fir (#2 grade) beam or 6"x12" Douglas Fir (#1 grade) beam You will need to have a local engineer detail your connections, size your support columns, and determine foundation requirements.
walkereng: Consultant: Experts are credited for each adequately Rated answer they provide.
walkereng: Consultant: If you have additional questions, please let me know.
walkereng: Consultant: Thanks
JustAnswer Customer: what about a lam beam.could I get under 12" with one of those?
JustAnswer Customer: My apologies.was on my cell.
JustAnswer Customer: First thank you and second where are you located?
JustAnswer Customer: Was thinking a glu lam or pre lam would enable me to get a smaller beam as it isn't holding up much though the span is 18'.
walkereng: Consultant: I am back and forth between California and Ohio.
walkereng: Consultant: I can run some numbers for a Boise Cascade Glulam beam, but you will have to check with them on which of their Glulams can be pressure treated for use under weather exposure.
walkereng: Consultant: Hold on while I run a few numbers.
walkereng: Consultant: I can give you an engineered wood option for your 18’ span beam: 5-1/8” x 10-1/2” Boise Glulam 24F-V4/DF This is a Boise Cascade product and you can go to the following link to find distributors in your area.
walkereng: Consultant: https:/www.bc.com/locations/
JustAnswer Customer: Thank you so much.one last question, would we have to attach straps to the above balcony floor boards for earthquake purposes?
walkereng: Consultant: You should go to the Simpson Strong Tie site and you can look at appropriate post caps (to attach your new beam to your posts) and floor joists hangers/clips (to attach your deck joists to your new beam).
walkereng: Consultant: https:/www.strongtie.com/woodconnectors/landing You should also beef up your existing connections between your ledger that is attached to your house and the house itself, along with your deck joist to ledger connections.
walkereng: Consultant: That is historically a common point of failure in decks like yours.
walkereng: Consultant: Hope this helps.
JustAnswer Customer: it does thanks.and is turning in to a bigger job than I thought!
walkereng: Consultant: Experts are credited for each adequately Rated answer they provide.
walkereng: Consultant: If you have additional questions, please let me know.
walkereng: Consultant: Thanks
walkereng: Consultant: Good Luck with your project!
Pearl Wilson: Assistant: If you have a home improvement or appliance question and want to chat with an expert now visit justanswer.com/ythi

Скачать видео