Hello! I'm putting together a plan to extend our deck and then install a DIY kit-pergola (aluminium). Im wondering if the below design/plan looks reasonable to the experts here?
In summary:
- existing low-level deck sitting next to a slab of concrete that was previously holding a rainwater tank
- I want to anchor a new joist to the joist on the edge of the existing deck, then build out the frame on concrete deck feet
- new frame will have additional joist on the edge with some blocking/reinforcement for the aluminium posts
- new frame needs to navigate around some plumbing against the house wall
- I will be reinforcing the opposite existing corners of the deck with some additional joists/blocking for the other two posts
- deck will sit on top, followed by the pergola posts which will anchor into the deck and underlying joists/blocks
Some dimensions/tech specs:
- area of new deck: 2500mm x 780mm
- area of entire deck (including new): 2500mm x 4500mm
- weight of pergola: 210kg (point load of ~52.5kg per post)
Figure 1: existing deck showing edge joist and beams opposite an empty concrete slab
Existing deck showing edge joist and beams
Figure 2: anchor new joist to existing, then extend out frame along adjustable deck feet, reinforcing corners and wrapping around unmovable plumbing.
Anchor new joist to existing, build out frame on adjustable deck feet, reinforce corners
Figure 3: lay decking
Lay deck
Figure 4: add pergola, anchoring to deck + underlying joists or reinforced blocking.
Add posts and anchor into deck + joists/reinforced blocking
