7000 × 3000 mm single-slope pergola. The platform is complete; this sheet covers the superstructure. 5 front + 2 side posts on independent concrete footings, fixed to the deck. The rear is tied to the wall with a ledger.
7000 mmwidth
3000 mmdepth
2880 → 2184rear → front height
13°roof slope
7posts (5 front + 2 side)
Overview.
The system logic: two separate load paths. Heavy load (roof + wind) goes down the posts to independent concrete footings; light load (platform) to the 60×130 frame.
Ready
Ground platform complete. 10 cm concrete + 15 cm aerated concrete (AAC) + 60×130 frame + 20×100 impregnated decking. This sheet does not touch it.
Superstructure
5 front + 2 side posts (100×100) + independent concrete footing
2 × front beam (100×200, spliced at the centre post @3500)
Posts sit on independent concrete footings; no load bears on the aerated concrete. Aerated concrete is non-structural; a post's point load would crush it. For each post: a pit at the deck edge → concrete → embedded U-base. Where a post is adjacent, it is side-screwed to the 60×130 frame (lateral stability).
Bozburun seafront: the real risk is wind uplift. With 5 front posts there are fewer hold-down points, so corner braces + the top connection chain (hurricane tie / joist hanger) are more critical. The slope stays at 13° — leaves/water run off easily, and the ~1984 clearance under the front beam still gives a workable passage.
Plan view.
Top-down view. 5 front posts at equal 1750 centres, splice at the centre post @3500. Ledger on the rear wall (no post).
Plan — 5 front + 2 side posts, 13 rafters + 2 mid-rails
Front elevation.
Front view. 5 posts at exactly equal 1750 centres, beam splice at the centre post @3500.
Front elevation — 5 posts at equal 1750 centres
Side elevation.
Side view. Slope 13°: rear 2880 → front 2184. Beam and ledger appear here in section.
Side elevation — slope 13°, beam & ledger in section
Posts & footings.
Each post sits on an independent concrete footing. No load bears on the aerated concrete.
Post base — independent concrete footing, bypasses the aerated concrete
Footing detail
At the deck edge a 25×25 cm section, 30 cm deep pit (for uplift).
The pit must reach firm base; if aerated concrete/fill is found, dig down to the concrete beneath so the footing does not "float".
Pour C20 concrete, set the embedded U-base anchor (the adjustable-foot type resolves level differences).
The top level of all 7 footings must match — check with a string line + water level.
Where adjacent, the post is side-screwed to the 60×130 frame (lateral stability; no vertical load).
Roof system.
Front beam
100×200 yellow pine, 2 pieces (4 m each). Splice over the centre post (@3500). Steel splice plate + bolt, L bracket on top, hurricane tie underneath.
Rafters + mid-rail
50×100, 3 m, 600 c/c → 13 rafters, no splices. Against buckling, 2 rows of upright mid-rail (purlin) — the builder's suggestion, correct.
Ledger (wall beam)
60×130, 2 pieces, at rear. M12 chemical anchor to wall ~600 c/c. Rafters hung with joist hangers.
Polycarbonate
10 mm UV twin-wall, ~21 m². Channels run with the slope (house → front). Aluminium H + U profile, EPDM-sealed screws.
Slope 13° (23%) — leaves/water run off easily, ideal for twin-wall polycarbonate. Bottom end open (condensation drainage), top end taped.
Metal connections.
The unseen parts that hold everything together. All must be galvanised.
Item
Where
Function
U-base (adjustable foot)
Post base → footing
Lifts the post off the concrete; prevents rot + uplift
Hurricane tie
Rafter ↔ front beam
Locks the rafter to the beam, against wind uplift
Joist hanger
Rafter ↔ ledger
Hangs the rafter from the wall beam in a pocket
Steel splice plate
Front beam splice @centre post
Joins the two beam pieces
M12 chemical anchor
Ledger ↔ wall
Fixes the wall beam to the wall
Local hardware-store names (Turkish): U-base = "ayar ayaklı direk pabucu / kolon ayağı" · hurricane tie = "mertek bağlantı sacı / rüzgar kelepçesi" · joist hanger = "kiriş askı pabucu / U askı".
Material list.
Superstructure — net quantities, excluding waste.
Item
Size
Qty
Status
Post
100×100 / 3 m
7 (5 front + 2 side)
on hand
Concrete footing
25×25×30 cm
7
to pour
Front beam
100×200 / 4 m yellow pine
2
to buy
Ledger
60×130
2 pieces
to buy
Rafter
50×100 / 3 m
13
to buy
Mid-rail
50×100
~4 pieces (2 rows)
to buy
Cross-brace
50×100
4
to buy
Polycarbonate
10 mm UV twin-wall
~21 m²
+ H/U profile
U-base
galvanised, adjustable foot
7
to buy
Hurricane tie
galvanised
~13
to buy
Joist hanger
galvanised
~13
to buy
Steel splice plate + bolt
front beam splice
1 set
to buy
M12 chemical anchor
ledger
~12
to buy
Stainless/galvanised screw
general
—
to buy
Dimensions assume 7000 centre-to-centre for the front beam. Once the outside-to-outside dimension is confirmed, the axis spacing will be updated together. Ø100 round poles are spare, for the garden/gazebo.
Assembly sequence.
Since the platform is ready, the superstructure is built in this order.
Pour the footings. At 7 points, a pit at the deck edge, C20 concrete, embedded U-base. Level them all to the same height.
Raise the posts. Set the 100×100s onto the bases, fix them plumb, side-screw to the adjacent 60×130s. Front posts to 2184 height, side posts bevelled to the slope.
Fix the ledger. Fix the 60×130 wall beam to the wall at slope height (rear 2880) with M12 chemical anchors.
Set the front beam. Place the two 100×200 pieces on the posts, splice exactly at the centre post; steel plate + L bracket.
Lay the rafters. Set the 13 rafters between the ledger (joist hanger) and the front beam (hurricane tie), at 600 c/c.
Fit the mid-rails. 2 rows of upright rail, tying the rafters together (buckling + support for the polycarbonate).
Cross-braces. 4 corners, post-to-beam at 45°.
Polycarbonate. Fit the profiles, fix the panels with sealed screws so the channels run with the slope.