Outdoor Structures

Outdoor Structures

Principal Built Engineering designs structural systems for outdoor structures in Melbourne, including decks, pergolas, carports, verandahs and garden structures. The design covers wind loads, footing design, material durability and connection detailing so the structure is safe and suits the building permit.

Each outdoor structure design is tailored to the site and to what the building surveyor needs for approval. Documentation is prepared to support the permit and to give the builder clear construction guidance.

  • Decks: Footing, bearer and joist sizing, post and bracing design, and the connection of the deck to the house, for new decks and for checks on an existing deck.
  • Pergolas and verandahs: Beam and post sizing, wind uplift tie down, and attachment to the existing roof or wall framing.
  • Carports and shade structures: Steel or timber framing, footing design for wind uplift, and compliance documentation for the building permit.
  • Garden and landscape structures: Footings and framing for screens, feature walls and similar structures, and retaining wall engineering where the structure also holds back soil.

Where a certificate is needed for the building surveyor, Principal Built Engineering issues structural compliance certificates with the design. For larger works around the home, see the residential structural engineering services, or request a quote with photos or plans of the proposed structure.

Outdoor Structures

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Frequently Asked Questions

Do I need a structural engineer for a deck or pergola?

Most decks, pergolas and carports that need a building permit in Victoria also need structural design documentation. The building surveyor confirms what is required. Principal Built Engineering prepares the footing and framing design and the supporting documentation.

What does a structural engineer design for a deck?

The design covers the footings, posts, bearers, joists, bracing and the connection of the deck to the house, sized for the loads the deck will carry and the wind and soil conditions on the site.

Can an existing deck be checked by a structural engineer?

Yes. A structural engineer inspection of an existing deck looks at the visible posts, footings, framing, balustrade and the connection to the house, and recommends repair or replacement where needed.

Why does wind matter for pergolas and carports?

Open roofed structures can be lifted by wind. The design sizes the members, fixings and footings to hold the structure down as well as to carry its weight.

What information is needed for an outdoor structure design?

Plans or sketches of the proposed structure, its size and height, the roof or decking material, photos of the site and of where it joins the house, and any soil report for the property.

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Detailed and practical drawings to support constructability.

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