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Question
Bruce, I have started a pergola over an existing deck it will be in two section on
higher the the other so one section (lower) is 14x16 I have used the following
materials 6x6 post 2x12x16 for the main supports now heres the question for
the 16 span I will need to buy 2x8x18s so I can have an overhang, will the 2x8s
be okay if I put 2x4s on top of the 2x8 ?
Hi Jeff, 2x8 for a 16 foot span is kind of puny. But if it is just for a pergola and you put the crown of the joist up you should be okay. I have a feeling that over time the 2x8 may want to sag a bit. I hope this information helps feel free to write again regarding this or other matters, sincerely bruce e johnson..bejohnsonconsulting.com
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Answers by Expert:
Bruce E. Johnson
Expertise
I can answer any construction related question in regards to carpentry, concrete, drywall, masonry, structural elements of any type of building, residential or commercial. Interior or exterior.
Experience
Custom Commercial and residential buildings. Churches, theaters, schools and auditoriums. Most recently I am working with the Catholic Church on several design build committees. I have a website related to scheduling and project supervision. Although my expertise is more related to multimillion dollar commercial, educational and theatrical projects my generous credentials in residential and remodelling construction make me a viable source of information regarding all forms of building questions.
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