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Looking to span 48 feet with timber, to support 30k with a
Looking to span 48 feet with timber, to support 30k with a wheel base of 35 feet (1 ton truck and trailer). I have large douglas fir trees and a mill … read more
walkereng
walkereng
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I am building a double outhouse and storage closet,
Hi! I am building a double outhouse and storage closet, basically 3 4'x4' rooms, on a 16'x8' deck. I am planning on using PT 4x6's on pre-cast pier blocks for the foundation. My question is: how far c… read more
walkereng
walkereng
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Need max. rafter spacing for cathedral ceiling, exposed
need max. rafter spacing for cathedral ceiling, exposed rafters on ridge beam w/2x6 fir decking over top; not sure whether to use 4x6 or 4x8 rafters, both Douglas fir #2 or better; the span is 12 ft. … read more
StructuralEng
StructuralEng
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I'm building a bridge with an 8 foot span over water. The
I'm building a bridge with an 8 foot span over water. The bridge will be 12foot long by 17 foot wide. I am using 12 inch beams 14 lb per foot with 4 inches of 5000 psi concrete. How much weight will t… read more
StructuralEng
StructuralEng
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I want to build a lightweight bridge that's 60 feet 7 ft
I want to build a lightweight bridge that's 60 feet long 7 ft wide over a shallow River. I need to join 3 20-foot 12 inch wide flange I beams (40 pounds per linear foot) together. There would be two I… read more
StructuralEng
StructuralEng
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How much weight will a 2x6x12 pressure treated beam support
how much weight will a 2x6x12 pressure treated beam support over a 12 foot span the footings are at the ends of the 12 foot span … read more
StructuralEng
StructuralEng
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I am rebuilding a 2nd story balcony/deck. It is connected to
I am rebuilding a 2nd story balcony/deck. It is connected to the house. I am needing to know if my beam size is correct. The span from post to post is 14'2.5". The joists will span 8'5' from house to … read more
StructuralEng
StructuralEng
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Have existing 38'x12' foot clear span bridge built in the
Have existing 38'x12' foot clear span bridge built in the 60s. Designed to carry 80,000 logging truck and still works great even with rotten wood decking. ( 1/2 load on bridge at a time since trucks a… read more
StructuralEng
StructuralEng
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I want to put a bridge over a stream using steel I beams the
I want to put a bridge over a stream using steel I beams the span would be 24ft I need this strong enough to drive a loaded cement truck across . what size beams would I need and how many Bridge will … read more
StructuralEng
StructuralEng
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I am designing a bridge over a shallow creek. The span is 9
I am designing a bridge over a shallow creek. The span is 9 feet. I will use five 12 foot 4x6 treated posts as horizontal joists on 24" spacing. The deck will be 8 foot 2x12s (treated). Will this be s… read more
StructuralEng
StructuralEng
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What's the span limit of 4x6 pressure treated Fir (I'm
What's the span limit of 4x6 pressure treated Douglas Fir (I'm presuming it was #2 grade prior to treatment) on 16” centers presuming a dead load of 10# ***** live load of 40# ***** a deflection limit… read more
walkereng
walkereng
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Building a deck 12 foot span 6x6 post to 6x6 post want use
Building a deck 12 foot span 6x6 post to 6x6 post want use 6x8 beam and hang 2x8 joists from it at 24in spacing… read more
StructuralEng
StructuralEng
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Hello - I am the process of researching the needed supplies
Hello - I am the process of researching the needed supplies to rebuild the bridge and would like to get you recommendations on the material and design. There are two concrete piles on each side of the… read more
walkereng
walkereng
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Bachelor's Degree
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I am building a deck with 5 1/8" x 19 1/2" inch glulams as
I am building a deck with 5 1/8" x 19 1/2" inch glulams as my beams. the deck is 23' x 29' with the longest span between beams 11' 6". The joists on the beams are 2" x 12" #1 fir 12" on center with 3/… read more
StructuralEng
StructuralEng
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I need to build a 20 foot bridge that will support a maximum
I need to build a 20 foot bridge that will support a maximum of 15,000 lbs (dump truck). What size and how many I beams would I need for this?… read more
walkereng
walkereng
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Bachelor's Degree
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I need to build a bridge over a 50 ft span with 2 beams. The
I need to build a bridge over a 50 ft span with 2 beams. The beams are 18 inch tall 11 inch wide and 72 pounds per foot what is the approximate weight limit… read more
StructuralEng
StructuralEng
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Bachelor's Degree
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I have a old bridge with 9- 6 inch by 17 inches tall 1/2 inch
I have a old bridge with 9- 6 inch by 17 inches tall 1/2 inch web on a 36 foot span bridge and need to get a 200,000 lb load on a 30foot axle spread across it. will the bridge with a cement deck hold … read more
StructuralEng
StructuralEng
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building an exterior deck attached to house. Ceramic tile
building an exterior deck attached to house. Ceramic tile over 1.25" mortar over waterproof membrane over 2x6 t&g fir over df wood joists at 36" o.c.. Max joist span is 9'. I have W6X9 steel I beams (… read more
walkereng
walkereng
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Bachelor's Degree
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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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