Table of Contents
This pergolaA structure with open wood-framed roofs, often latticed and supported by regularly spaced posts or columns, and covered by climbing plants such as vines or roses, shading a walk or passageway. Pergolas are distinguished from “arbors,” which are less extensive in extent and structure. is called the ‘box’ pergola because it is built with rows of solid blockings/nogs between the rafters forming rows of square or oblong boxes. This type of pergola is becoming increasingly popular and is relatively easy to build.
Material
| <spanThe horizontal distance between supporting structures.>MATERIAL | AMOUNT |
| 150×50 (2×6) treatedPressure treated. Refers to lumber that is treated in such a way that the sealer is forced into the pores of the wood. Refers to lumber pressure sprayed with chemicals to lengthen its life expectancy for outside use or inground applications. lumberAny of the framing wood. rafters, blockings/nogs and decorative ends | 30 metres (100 ft) |
| 200×50 (2×8) treated lumber beamA supporting member. | 3.6 metres (12 ft) |
| 100×100 (4×4) treated lumber | 7.2 metres (24 ft) |
| 1kg (2.5 lb) gal 90mm (3 1/2″) nails; 20 galvanizedCovered with a protective coating of zinc. nailA short nail with a large flat head used for securing roofing felt, plasterboard, sheet metal to wood etc. plates; 8 12mmx120mm (1/2″x 5″) galvanized coachAre round headed bolts with square shoulders that resist rotation when located or driven into place. They can be called coach bolts or carriage bolts depending on which part of the world you live in. The head end of the bolt does not need a washer, but the other end of the bolt (the nut end) usually does./carriage bolts, 2 bags concreteA mixture of sand, gravel, water and cement which hardens to a stone like condition when dry. mix |
About the lumber
All the lumber used in this project is treated dressedSurfaced; planed; smooth; even surface; gauged./surfaced pine. The posts are treated for in ground applications. and the rest of the structure is treated for outside use. All the lumber that is used in this project is readily available at most lumber merchants.
The lumber sizes referred to in this project are the nominal sizes. The nominal sizeThe rough-sawn size of a piece of lumber. Before the lumber is surfaced, planed or dressed. The nominal size is usually greater than the actual dimension. e.g. 100x50 (2 x 4) actually equals 90x45 (1 1/2" x 3 1/2"). of a piece of lumber is the size of the lumber before it is dressed or seasoned and is the size generally referred to when purchasing from the lumber yard. The actual sizeThe finished (dressed) size as opposed to the nominal size of a piece of wood., or dressed size of the lumber will be less than the nominal size so please make necessary allowances. For example, a piece of 100×50 (2×4) lumber when dressed may be 90×45 (1 1/2″x 3 1/2″) actual size.
A well thought out plan, using simpler methods of construction. The goals of great strength and cost make this attractive.