Our footing and slab details are drawn to a standard scale of 1:20 and are dimensionally correct to help us identify any potential clashes.ĭrawing sheet S5 of our sample engineering drawings provides the exact way we expect the edge beams, internal strip footings and slab thickening to be constructed. These notes include requirements for surface drainage, trench drainage, plumbing joints, trench backfill and the presence of trees. Correct placement of the steel mesh reinforcement towards the top of the thickness of the slab minimises shrinkage cracking and ensures sufficient concrete ‘cover’ to prevent corrosion fo the reinforcement.ĭrawing S4 also has the requirements for reinforcing the Besser block walls specified in the “Concrete Masonry” notes.įinally, sheet S4 has the Special Requirements for building on (in this case) a Class “M” site. We show the slab thickness in a hexagon and the require top cover for the internal and external concrete slab areas. We show three parallel diagonal lines across re-entrant corners as required by AS2870 to minimise the propagation of shrinkage cracking at these stress points. A schedule in the top right hand corner which clearly describes the dimensions and reinforcement for the edge beams and strip footings and slab thickenings.Slab thickenings under bracing walls that do not otherwise have strip footings or edge beams under them.SF1, SF2 and SF3 strip footings through the middle of the slab spaced out to comply with AS2870.EB1 and EB2 edge beams to the perimeter of the slab.Our footing and slab plan is drawn at the standard metric scale of 1:100. Our sample drawing shows a typical raft footing and slab design to AS2870 on Sheet S4 Sheet 2 and Sheet 3 of the sample engineering drawings contain the notes relating to the safe construction of the dwelling. structural timber notes that describe the minimum expected timber grades to use, the timber dimensional tolerances, the corrosion protection requirements for bolts and screws and a fallback statement referring the builder to AS1684.3 for any elements not specified on the drawings.concrete masonry notes that explain the required compressive strength of the concrete Besser blocks and the corefill, the minimum grout cover tot he reinforcement and the special instructions to the builder for not cutting chases in the wall and propping retaining walls.concrete notes that dictate the minimum concrete grade for different aspects of the project, minimum concrete cover to the steel reinforcement, the required slab curing and the grades of steel reinforcement to be used.foundation notes that explain the expected ground conditions and how the builder should treat them.general notes that describe the wind speed the house has been designed for, a warning not to scale off the drawings, the design floor loads used to prepare the drawings, and a note that if trade names have been used to specify a product that an equivalent product may be used from a different supplier.There is a section of notes for each major form of construction in the job. These notes need to be specific to each project because they are very important. Other companies might use Standard Notes as the first page of their drawings. We’ve called them Project Specific notes because we revisit these notes for each and every project.
Our first page contains the project-specific notes. Let’s go through some of the aspects of what makes these sample engineering drawings so special. This example set of plans is for a single storey house with a concrete slab on ground, concrete Besser block masonry walls and a timber roof trusses. So I’ve prepared a sample set of our structural engineering house plans for your enquiring mind! It’s hard to explain what structural engineers produce when we do structural engineering for a new house.
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