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Were in the process of reinforcing my deck. Need some help with how we are doing it. First off the spa is a Hotsprings Jetsetter, 95 lbs per square foot required. The deck is 16 in on center, 2 by 8 joists,each joist 10 feet wide, joists running width. One side is on notched 4 by 4 posts every 5 ft, the other side is on band board, 2 by 10, bolted to house. We are putting four, 6 by 6 posts notched under joists in middle of tub, in a straight line. We are also doubling the 2 by 8 joists under the spa area going the 10 foot width, as what is all ready there. So my question is, should the 6 by 6 posts be straight in a row or should the posts be in a square around the spa. If the straight in the row will work that's good for me, since the holes are dug already, but not set and pored yet.
This deck runs between the main house (brick) and addition ( frame/ vinyl ) that was built 20 years ago. Deck is 10 feet wide by 40 ft long between houses (spa area)and 10 feet wide by 38 feet long, going down side of addition..
The new floor decking is the plastic Azek and is ok 16 in on center.
P.S My brother and I are doing this work, he has built hundreds of houses and knows his stuff, I just want to be sure the structure is done in a safe manor and not void my warranty if not supported correct.
The spa will be delivered next week.
Any info on this issue would be great,
Thanks,
Rick
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I am in the process of reinforcing my 16 wide by 12 long deck 6 feet above grade. I am adding a (3) 2 by 10 beam near the end, 10 ft from ledger board. This deck has been suspended by (2) 4by4 posts at the 12 ft end. I am susprise that it has not collaped, perhaps since it does not get any use after building the patio below 8 years ago.
The new beam with three 2by10 on 6by6 post 10.5 ft appart should support the existing 2by8 12 foot joists to Code. 10.5ft is the max span for 2by8 and the new beam is at 10ft. This leaves overhangs of 2 and 2.5 feet on the 3 sides.
I can foresee problems building the beam on the ground and then lifting it onto the notch of the 6by6 post. Planning to lift each 2by10 individualy, securing it first, then lifting the second, then lag bolt those two, lift the third, continue with the lag bolts. Then slide the notched 6by6 underneath the beam while lifting the deck up a bit with a hydraulic jack.
The boot of the existing 2by8 are nearly level, 0.5 inch error at most using a 6 fool level. Hence will have to shim the gaps between new beam and existing joists.
Is shiming gaps OK?
Robert Illan
Huntsville, AL USA
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