Build a Tree Bench-lawka.pdf

Build a Tree Bench

Introduction

Encircle a tree with a hexagon

To build your own shady retreat, first choose a tree where you would like to sit in a

quiet, secluded area, maybe overlooking a favorite part of the yard. The tree should

not be tilted too much or have many visible roots. The method of construction is to

build the bench in two sections, then locate the postholes by holding the bench

temporarily in place.

Before you start

Purchase or rent a power miter box or radial saw—something that can make precise

30-degree cuts. Measure your tree's diameter 18 inches from the ground to determine

the inside dimension of the bench. Use pressure-treated lumber for the posts and

supports, and cedar, redwood, or pressure-treated lumber for the seat pieces. Draft

at least one helper for the final assembly.

Materials

•

4x4 posts

•

2x4s for seats and supports

•

3-inch galvanized deck screws

•

5-inch hex bolts, nuts, and washers

•

Gravel

Instructions

1. Assemble supports. Put together six bench supports, using 2x4 pieces and screws.

The faces of these will show, so make sure the ends of the three pieces are evenly cut

and flush.

2. Cut the inside pieces. Cut six pieces of 2x4 to be used as the seat pieces closest to

the tree. The measurement of the longest side will equal the diameter of your tree. (If

you have a fast-growing tree, make them 2 inches longer.) With two helpers, hold up

all six pieces around the tree to make sure they are the right size.

3. Start the layout. On a large, flat surface, lay out the first bench section (half the

circle), using four seat supports and three of the bench pieces that you have just cut.

Adjust them so that all angles are equal. Do not assemble yet.

4. Cut and install boards. Trim the rest of the boards, using the already-cut boards as

guides. After positioning them tightly, install them with 3-inch galvanized deck

screws.

5. Build the second section. This will only have two bench supports, so screw pieces of

2x4 onto the bottom of each end for temporary support.

6. Set the sections. Set the two sections in place by resting them on chairs. When the

whole assembly is positioned correctly, hang a plumb line from the center of each

bench support and dig up a bit of turf to mark each posthole. Shift the whole

assembly to avoid large, exposed roots.

7. Dig the postholes. You will probably run into underground roots. Do not cut large

roots, or you may kill the tree. As a general rule, any root less than 1 inch in diameter

can be cut. Some postholes—no more than three—can be left shallow. Shorten the

posts accordingly. Be sure the holes are wide enough.

8. Install the posts. Cut six 4x4 posts to the correct length—the depth of the hole plus

16 inches. Cut a tenon on one end so that the post will fit into the bench support.

With your bench sections upside down, install each post, fastening it securely with a

5-inch hex bolt, a washer, and a nut.

9. Set the bench. Set the section with four bench supports in the postholes first. Then

lower the other section into place. Make adjustments until the bench is level all

around. Install the final screws, set the posts into the holes, and tamp in place.

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