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A full 8-foot picnic table with THREE A-frame leg sets — the top boards go on uncut at stock length, and the middle legs are what keep an 8-foot span from sagging.
| Part | Qty | T × W × L | Material | ✓ |
|---|---|---|---|---|
| Legs Both ends 22-1/2°, cut PARALLEL, long point to short point. | 6 | 1 1/2" × 3 1/2" × 30 7/8" | 2x4 | ☐ |
| Seat supports Both ends 22-1/2°, NOT parallel (trapezoid), long point to long point. | 3 | 1 1/2" × 3 1/2" × 60 1/2" | 2x4 | ☐ |
| Table supports Both ends 22-1/2°, NOT parallel, long point to long point. | 3 | 1 1/2" × 3 1/2" × 29 1/2" | 2x4 | ☐ |
| Cross braces Both ends 15°, PARALLEL, long point to short point. | 2 | 1 1/2" × 3 1/2" × 45 3/4" | 2x4 | ☐ |
| Top and seat boards Uncut, full stock length. Four top, two per seat, one spare width in the layout. | 9 | 1 1/2" × 5 1/2" × 96" | 2x6 | ☐ |
| Item | Qty | ✓ |
|---|---|---|
| 2x4, 8 ft The three leg sets and braces. | 6 each | ☐ |
| 2x6, 8 ft Top and seats, used at FULL stock length — pick straight ones; nothing hides on an 8-ft plane. | 9 each | ☐ |
| Exterior screws, #9, 2-1/2" to 3", star drive Construction or deck screws. | 100 each | ☐ |
| Exterior wood glue | 8 oz | ☐ |
| Penetrating exterior stain Semi-transparent or opaque. Applied to the boards BEFORE cutting — the source's tip, and the right call. | 1 qt | ☐ |
Overall cost: $$$. Lumber varies by region, species, and season, so we give a band rather than a figure.
Tools: Random Orbit Sander. Materials: 2x4, 8 ft, 2x6, 8 ft, Penetrating exterior stain
Stain every board on sawhorses and let it dry before you cut a thing. Fifteen boards flat in the driveway beats one assembled table with sixty inside corners — and stain reaching the future joint faces is real rot protection, not just convenience. Cut ends and tops get a touch-up coat at the end.
Tools: Drill / Driver, Miter Saw, Tape Measure. Materials: 2x4, 8 ft, Exterior screws, #9, 2-1/2" to 3", star drive, Exterior wood glue
Lay two legs and one table support flat, top edges flush, leg feet at the correct spread, and screw with three screws and glue per joint. Slip 2x4 scraps under the legs so everything lies level while you drive — A-frame parts don't sit flat unaided, and this cheap trick is the difference between joints that align and joints that argue.
Flip, position the seat support, screw with three per joint. Build all three sets as clones.
Tools: Drill / Driver, Pencil, Tape Measure. Materials: 2x4, 8 ft, Exterior screws, #9, 2-1/2" to 3", star drive, Exterior wood glue
Mark the centers of the seat and table supports. Run one 15° cross brace from an end leg set to the middle set, centered, top edges flush; repeat from the other end to the middle. The braces triangulate the whole undercarriage — the reason this table won't rack when ten people sit down at once.
Tools: Drill / Driver, Tape Measure. Materials: 2x6, 8 ft, Exterior screws, #9, 2-1/2" to 3", star drive
Set the first two 2x6s on the table supports — side edges flush with the support ends, overhanging each end of the table by 1-1/2" (a 2x4 scrap held vertical is exactly the right gauge). Two screws per board per support.
Then fill in the remaining top boards with even gaps. Uncut 8-foot boards mean the ends are factory-straight — enjoy the one part of the build with no sawdust.
Tools: Drill / Driver, Random Orbit Sander. Materials: 2x6, 8 ft, Exterior screws, #9, 2-1/2" to 3", star drive, Penetrating exterior stain
Screw the seat boards to the seat supports the same way — two per joint, even gaps. Sand any raw spots, then run the touch-up coat over tops, seats, and every cut end.
Then invite too many people over on purpose. The middle legs have you covered.