How to Build a Picnic Table That Seats Six Adults

Choosing Lumber: Pressure-Treated Pine vs. Cedar

Pressure-treated southern yellow pine is the most economical choice. A 2x8x8 board costs $7.50 at Home Depot. A 2x6x8 board costs $5.50. The entire table requires roughly $100 to $120 in pressure-treated lumber. Pressure-treated pine has a green tint when new that weathers to a brown-gray within 6 to 12 months. It resists rot and insect damage for 15 to 20 years thanks to the copper-based preservative forced into the wood under pressure.

Cedar costs roughly twice as much. A 2x8x8 cedar board runs $14 to $18. The total lumber cost for a cedar table is $200 to $240. Cedar has a warm reddish-brown color, a pleasant aroma, and natural rot resistance without chemical treatment. Cedar is lighter than pressure-treated pine (roughly 20 percent lighter per board foot), which makes the table easier to move but also means it is less stable in high wind. Cedar is the better choice if the table will be left unfinished with a natural look. Pressure-treated pine is the better choice if you plan to paint or stain the table.

Redwood is another option at $18 to $25 per 2x8x8 board, but the price premium over cedar is hard to justify for a picnic table. Redwood's primary advantage is dimensional stability (it shrinks and warps less than pine or cedar), but for an outdoor table where some movement is acceptable, cedar performs equally well at half the cost of redwood.

Complete Cut List

This table uses all standard-dimension lumber. Actual dimensions of a 2x8 are 1.5 inches thick by 7.25 inches wide. Actual dimensions of a 2x6 are 1.5 inches thick by 5.5 inches wide. Actual dimensions of a 2x4 are 1.5 inches thick by 3.5 inches wide.

Tabletop (five 2x6 boards)

Cut five 2x6 boards to 72 inches long. These form the tabletop surface. Five boards at 5.5 inches wide each produce a tabletop width of 27.5 inches, which provides enough room for plates, drinks, and serving dishes. The 72-inch length seats three adults per side with roughly 24 inches of shoulder width per person.

Bench Seats (four 2x6 boards)

Cut four 2x6 boards to 72 inches long. Two boards per bench, one on each side of the table. Each bench surface is 11 inches wide (two 5.5-inch boards), which provides adequate seating depth for adults.

Table Legs (four 2x6 boards)

Cut four 2x6 boards to 33 inches long. These are the A-frame legs. The legs are cut at an angle at the top end: measure 33 inches along one edge, then mark a 22-degree angle across the width of the board. This angle matches the A-frame geometry that supports the tabletop and bench. Cut the angle with a circular saw.

Cross Braces (four 2x4 boards)

Cut four 2x4 boards to 30 inches long. Two cross braces connect the table legs at the top (supporting the tabletop), and two connect the legs at the bottom (providing lateral stability). The cross braces are notched 1.5 inches deep at each end to fit over the legs.

Table Support Cleats (two 2x4 boards)

Cut two 2x4 boards to 60 inches long. These cleats run perpendicular under the tabletop boards, screwed to the underside of the tabletop and bolted to the leg cross braces. The cleats support the tabletop and transfer weight to the legs.

Hardware

One box of 3-inch exterior deck screws ($12 for a 5-pound box, roughly 200 screws). One box of 1.5-inch exterior deck screws ($8 for a 1-pound box). Eight 3/8-inch by 4-inch carriage bolts with washers and nuts ($10). The carriage bolts attach the tabletop cleats to the leg cross braces, creating a strong mechanical connection that allows the table to be disassembled for moving or storage.

Tools Required

A circular saw ($40 to $80) makes all the straight cuts. A jigsaw ($30 to $50) is useful for the angled leg cuts if you do not want to set up a circular saw for angled cuts. A drill/driver with a 1/4-inch hex bit for screws and a 3/8-inch bit for carriage bolt holes. A tape measure, a combination square, and a pencil for layout.

A socket wrench ($10 to $15) tightens the carriage bolt nuts. A 4-foot level ($10) checks that the table sits flat during assembly. Clamps ($8 to $15 each, two recommended) hold boards in position while you drill and screw. Safety glasses, ear protection, and a dust mask are required when cutting pressure-treated lumber, which produces fine sawdust containing copper compounds.

Building the A-Frame Leg Assemblies

The table has two A-frame leg assemblies, one at each end. Each assembly consists of two legs connected by a top cross brace and a bottom cross brace. The legs splay outward at the bottom, creating a stable base that resists tipping.

Cutting the Leg Angles

Each leg is a 2x6 board cut to 33 inches long with a 22-degree angle at the top. The angled end rests against the tabletop cleat, while the straight bottom end sits on the ground. Mark the angle using a speed square ($8) set to 22 degrees, or use a protractor and pencil. Cut with a circular saw. Make both legs for one end identical; if the angles are off by even 2 degrees, the table will rock.

Notching the Cross Braces

The top cross brace connects the two legs near the top and supports the tabletop cleats. The bottom cross brace connects the two legs near the bottom and prevents the legs from splaying outward under load. Both cross braces are notched at each end to fit over the 1.5-inch thickness of the legs.

Measure 2 inches down from the top of each leg and mark a horizontal line across the 5.5-inch width. This is where the top cross brace sits. Measure 8 inches up from the bottom of each leg and mark another line for the bottom cross brace. The bottom brace position determines how far the legs splay outward.

Notch each cross brace end by marking a 1.5-inch deep by 1.5-inch wide notch at both ends. Cut the notch with a circular saw set to a 1.5-inch depth, making multiple parallel cuts within the notch area, then knock out the waste with a hammer and clean up with a chisel. The notches allow the cross brace to sit flush against the leg, creating a strong lap joint.

Assembling the A-Frame

Lay two legs on a flat surface, angled tops facing each other, with the bottoms splayed apart. The distance between the bottoms should be 34 inches (measured from the outside edges). Position the top cross brace in its notches and the bottom cross brace in its notches. Drill two pilot holes through each cross brace end into each leg. Drive 3-inch exterior screws through the pilot holes. Each cross brace should have four screws total (two into each leg).

Build the second A-frame assembly identically. Both assemblies must be mirror images of each other, not copies. Stand both assemblies upright and check that they sit flat on the ground without rocking. If one rocks, the cross brace positions are not symmetrical; adjust by loosening the screws and repositioning the brace.

Attaching the Tabletop and Benches

Mounting the Cleats

Lay the two 60-inch 2x4 cleats flat on the ground, parallel to each other, 24 inches apart (measured from the outside edges). The cleats will run the length of the table and support the tabletop boards. Position the first A-frame assembly upright at one end of the cleats. The angled tops of the legs should rest against the inside faces of the cleats. Drill a 3/8-inch hole through each cleat and through the top cross brace. Insert a 4-inch carriage bolt through each hole, with the bolt head on the outside of the cleat and the nut on the inside. Tighten with a socket wrench. Repeat for the second A-frame at the other end.

The carriage bolts allow you to disassemble the table by removing four nuts. This is useful for moving the table to a new location or storing it indoors during winter. The bolts also provide a stronger connection than screws alone, because the bolt shank resists shearing forces that would cause screws to snap under heavy loads.

Laying the Tabletop Boards

Lay the five 72-inch 2x6 tabletop boards across the cleats, perpendicular to the cleats. Space the boards with a 1/8-inch gap between them to allow for water drainage and wood expansion. A 16d nail ($3 per box) placed between boards as a spacer maintains consistent gaps. Predrill two holes through each board into each cleat (10 holes per board, 50 holes total). Drive 1.5-inch exterior screws through the predrilled holes into the cleats. Predrilling prevents the pressure-treated wood from splitting, which is a significant problem with 2x6 boards and screws placed near the edges.

Attaching the Bench Seats

Each bench consists of two 72-inch 2x6 boards bolted to the outside of the leg assemblies. The bench height should be 17 to 18 inches from the ground to the top of the bench surface, which is the standard seating height for dining tables. Position the bench boards against the outside face of the legs, with the top edge of the boards 17 inches from the ground. Drill 3/8-inch holes through the bench boards and through the legs. Insert carriage bolts with washers and nuts. Two bolts per bench board per leg assembly (eight bolts total per bench) provide a secure connection.

Space the two bench boards per side with a 1/8-inch gap, matching the tabletop spacing. The bench boards should overhang the leg assemblies by 2 inches on each end for visual balance.

Sanding and Finishing

Sand all exposed surfaces with 80-grit sandpaper to remove mill marks and splinters, then progress to 120-grit for a smooth finish. Pay extra attention to the tabletop surface, the bench seats, and the top edges of the legs where arms will rest. Round over all exposed edges with a router and a 1/4-inch round-over bit ($15), or sand them by hand with 120-grit paper wrapped around a block of wood. Rounded edges are more comfortable to lean against and less likely to cause splinters.

Apply a finish to protect the wood from UV damage and moisture. For pressure-treated pine, wait 2 to 4 weeks after building before applying any finish. Freshly pressure-treated wood has a high moisture content (30 to 50 percent), and finishes applied to wet wood will peel as the wood dries. Press your thumb into the wood surface; if it does not leave an impression, the wood is dry enough to finish.

Thompson's WaterSeal ($15 per gallon) is a penetrating water repellent that does not form a film on the surface. It is the simplest finish to apply: brush it on, wait 10 minutes, and wipe off excess. It needs reapplication every 1 to 2 years. For a longer-lasting finish, use an exterior stain such as Cabot Solid Color Stain ($35 per gallon) or Olympic Maximum Stain and Sealant ($30 per gallon). Stain provides UV protection that clear water sealants do not, and it lasts 3 to 5 years before needing reapplication. Apply two coats with a brush or pad applicator, allowing 4 to 6 hours between coats.

Moving and Winter Storage

This table weighs roughly 120 to 140 pounds assembled. Two adults can lift and move it short distances by grabbing the bench seats. For longer moves, remove the four carriage bolts from the tabletop cleats, lift the tabletop off the leg assemblies, and carry the components separately. The leg assemblies weigh roughly 25 pounds each; the tabletop with cleats weighs roughly 50 pounds.

Store the table indoors or under a waterproof cover during winter. A custom-fit cover made from heavy-duty vinyl ($25 to $40) protects the table from snow and ice. If you leave the table uncovered, the wood will develop surface checking (small cracks along the grain) from repeated wetting and drying cycles. Surface checking does not affect structural integrity but looks rough. Sand and refinish in spring to restore the surface.

Actual Cost Breakdown

Here is the material cost for a pressure-treated pine table built in April 2026 at Home Depot in Denver, Colorado. Five 2x6x8 boards for the tabletop: $27.50. Four 2x6x8 boards for the benches: $22. Four 2x6x8 boards for the legs: $22. Four 2x4x8 boards for cross braces and cleats: $14. One box of 3-inch exterior screws: $12. One box of 1.5-inch exterior screws: $8. Carriage bolts with hardware: $10. Total: $115.50. Sandpaper, stain, and a brush add roughly $20 to $30 if you do not already own them.

Construction time was 5.5 hours working alone, including cutting, assembly, and sanding. A second person holding boards in position while you drill and screw reduces the time to roughly 3.5 hours.