AS3500.3 Box & Eave Gutter Calculations

$250-750 AUD

Closed

Posted about 1 month ago

$250-750 AUD

Paid on delivery

I’m preparing construction documents for a small-scale residential roof (under 100 m²) that sits in a region with rainfall intensities above 100 mm/hr. I need verified hydraulic calculations that size the box gutter, associated rain head and the eave gutter so that the entire system complies with AS 3500.3 (2025). Please run the full flow path analysis—catchment, flow rates, gutter cross-sections, sump / rain-head dimensions, downpipe sizing and overflow provisions—and present your working, references to the relevant clauses, and any assumptions. A concise PDF report plus the editable worksheet (Excel, Mathcad or similar) will be perfect. If you usually illustrate the results on a simple plan or section, feel free to include that as well; it helps the builder. Deliverables • Calculation report (PDF) referencing AS 3500.3 (2025) • Editable calculation file • Any supporting sketches or mark-ups I will provide roof plans and site rainfall data on award. Let me know your expected turnaround and any clarifications you need so we can lock this in quickly.

Building Design

Building Engineering

Roofing

Structural Engineering

Excel

AutoCAD

Civil Engineering

Building Architecture

Project ID: 40337378

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11 freelancers are bidding on average $510 AUD for this job

@muhannadbukhamse

Hi, this is Mohand, a hydraulic and structural engineer with strong experience in roof drainage design to Australian standards. I’m excited about your “AS3500.3 Box & Eave Gutter Calculations” and can provide fully checked sizing for box gutter, rain head, eave gutter, and downpipes for your <100 m² roof in high‑intensity rainfall conditions. I will run a complete flow path analysis including catchment areas, design rainfall, flow rates, gutter cross-sections, rain-head/sump geometry, downpipe diameters, and compliant overflow provisions in line with AS 3500.3 (2025). My workflow includes showing every step of the working, clearly stating assumptions, and directly referencing the relevant clauses/tables from the standard so the building surveyor can follow the logic. I routinely prepare hydraulic and civil calculations in Excel and Mathcad for residential and small commercial projects, and I can also overlay the results on your roof plan to make it easy for the builder to install correctly. The deliverables will be a concise PDF calculation report,

$500 AUD in 5 days

5.0

(10 reviews)

5.3

@EngineerSibora

Hi there, You have a residential roof under 100 m² with rainfall intensities above 100 mm/hr—box gutter, rain head, eave gutter must be sized correctly to AS 3500.3 (2025). If gutters are undersized or overflow provisions missing, water backs up and the system fails during first heavy rain. I deliver verified hydraulic calculations with full traceability. Here is how we work: You share roof plans and site rainfall data → I run full flow path analysis: catchment, flow rates, gutter cross-sections, sump/rain-head dimensions, downpipe sizing, overflow provisions → calculate box gutter and eave gutter sizing per AS 3500.3 (2025) → deliver concise PDF report with references to relevant clauses and assumptions, editable calculation file (Excel/Mathcad), and supporting sketches for builder. Ready when you are. Best, Eng. Sibora

$500 AUD in 7 days