Cornell Engineers / Technical Resources
Sample Structural Engineering Drawings
A closer look at the engineering documentation behind a building — from foundations and framing to bracing, connections and construction details.
Understanding how a structure was intended to work is often the starting point for understanding why it has failed.
Structural engineering drawings do more than specify the sizes of beams, footings and other structural elements. They communicate how a building is intended to work, how forces are transferred through the structure and how the various components must be connected.
These historical sample drawings were prepared by Cornell Engineers for a single-storey house with a concrete slab-on-ground, reinforced concrete masonry walls and timber roof trusses.
Although our practice now concentrates on complex structural investigations, building damage, forensic engineering and repairs, our background in design and construction is central to that work.
Technical drawing set
Explore the Complete Drawings
Eight sheets covering project-specific notes, safe design, footings, framing, bracing and structural connections.
View Sample Drawings (PDF) ↗Historical educational example only. Not approved for reuse as a current construction design.
Drawing set overview
What’s Inside the Drawing Set?
Select a sheet to explore its purpose and the engineering principles it illustrates.
SHEET 01
Project-Specific Notes
Structural notes establish the design assumptions, material specifications and construction requirements that apply to the project.
The sample notes cover wind loading, foundation conditions, concrete strength, reinforcement, concrete masonry, structural timber and construction requirements.
Why this matters: During a structural investigation, the original notes help establish what the designer required and whether the completed construction reflects those requirements.
SHEETS 02–03
Safe Design Notes
These sheets document safety considerations identified during preparation of the structural design.
They form part of the overall documentation and should be considered alongside the drawings, specifications and construction methodology.
SHEET 04
Footing and Slab Plan
The footing and slab plan shows the arrangement of the foundation system and how the building is supported.
- Perimeter edge beams and internal strip footings.
- Slab thickenings beneath nominated bracing walls.
- Footing dimensions and reinforcement schedules.
- Slab thickness and reinforcement requirements.
- Reinforcement at corners and changes in geometry.
- Site-specific requirements relating to drainage and ground conditions.
Why this matters: Footing design, soil conditions, drainage and actual construction are often important when investigating building cracking and movement.
SHEET 05
Footing and Slab Details
Plans identify where structural elements are located. Details explain how they must be constructed.
These drawings illustrate edge beams, strip footings, slab thickenings, post supports, wet-area set-downs and reinforcement arrangements at corners and junctions.
Clear details are particularly important where different elements meet and where construction errors could affect structural performance.
SHEET 06
Bracing and Structural Framing Plan
The bracing plan identifies elements that resist lateral forces, including wind loads, together with associated framing information such as roof beams, lintels and member schedules.
Bracing elements must be considered as part of a continuous structural system, including their connections and the elements supporting them.
Why this matters: A failure or deficiency in one part of the load path can affect the performance of the wider structure, even where individual members have adequate capacity.
SHEET 07
Roof Framing Details
Roof framing details show how beams, rafters, trusses and supporting elements are intended to connect.
Connection design is fundamental to structural performance. Adequate member sizes alone do not establish an adequate structure unless the forces can be transferred through the connections.
These principles are particularly relevant to investigations involving roof failures, inadequate tie-down, altered framing and discrepancies between drawings and construction.
SHEET 08
Bracing Details
Bracing details show how lateral forces are transferred from the roof and upper structure through the walls and floors to the foundations.
The connection arrangement and capacity are as important as the bracing element itself.
Engineering principle: A structure must provide a continuous and adequate load path. A strong component cannot compensate for an inadequate connection elsewhere in that path.
Engineering investigations
What Drawings Can Tell Us About a Building Problem
Structural drawings are often among the first documents reviewed when investigating damage, movement, defects or failures in an existing building.
They help establish the intended structural arrangement, design assumptions, materials, load paths and connection requirements.
Comparing the drawings with the existing building may identify undocumented alterations, missing connections, different member sizes or other discrepancies requiring assessment.
Drawings are evidence of the intended design, not proof of what was actually constructed. Site inspection, measurements and further investigation may be needed before conclusions can be reached.
Additional technical resource
Example Brick Veneer Footing Details
We have retained an example set of brick veneer footing details as a historical technical reference for engineers, designers and others interested in structural documentation.
View Example Footing Details (PDF) ↗
These examples must not be adopted for construction without appropriate project-specific engineering assessment and design.
Cornell Engineers
Complex Structural Investigations and Engineering Advice
Cornell Engineers has provided structural engineering services since 2003. Our experience in structural design and construction now supports a practice focused on complex building problems, damage investigations, forensic engineering and practical repair strategies.
We investigate cracking, movement, footing problems, roof and framing failures, construction defects, water-related building damage and matters requiring independent engineering judgement.
Our reports aim to explain what has happened, why it has happened, its engineering significance and what should be done next.
Have a difficult structural or building problem?
Tell Us About Your Project ↗
12 replies on “Sample Structural Engineering Drawings”
HI there.
We’re doing some renovations in a unit we recently purchased and I’m after a quote for drawings for demotion of a couple of internal walls
I am empress with your work sir. I will like to be trained by you sir.
Please can any one tell me what are the softwares the structural engineers in Australia use for structural computations , is the any one of them for free
Nazar
We use SpaceGass for 3d frame analysis. Not free.
We use Design in Hyne for timber design. Free.
We do our calculations by hand for each and every job. We would rather check each job in detail than standardise calculations and miss design elements and connections.
Hi
I’m interested in adding a monitor roof to a timber extension I’m planning to build. I’m a retired builder and (typical of builders!) can’t quite visualise how a timber monitor section with clerestory windows all round can be built and be structurally sound. Extra challenge: no steel as this is a carbon neutral build. Any advice?
Harry
Hi Harry
I think you’ll have some work to do. Monitor roofs aren’t common in Australia so I had to look it up. BUT a retro-fit monitor roof looks virtually impossible structurally. Maintaining support for the existing roof rafters will be the challenge. Maybe some extra loadbearing walls but I think this will destroy the impact.
Best of luck!
Matt Cornell
Should have made it clear that the clerestory windows are part of a new build. Also has a skill ion roof section at one side, thereby creating a 19th century Australian shed look. Does the new build make it easier to design?
Hi Harry.
I guess it makes it easier to build than a modification. The forces above and below the window still need to be transferred to the rafters each side of the window. Let us know how it goes!
You have just a small type error at the beginning of your site.
‘structural enigneering’
Thank you, Diane. It’s probably important that we spell “engineering” correctly! I appreciate you taking time to help improve our site.
Matt
Hi Matt
I am particularly intrigued & impressed by the bracing wall capacity & connection specification. I usually specify the type of bracing (strap, ply, etc) and length of the panel (where not a whole wall length). I would think most engineers do not specify the total capacity of individual walls or the top of wall connections – simply leaving it to the builder or inspector to decide/direct as per AS1684.2. But your drawings give clearer direction to the builder/inspector without the engineer having to specify every connection.
I wonder how many buildings are constructed with wall bracing that do not have specific top/bottom connections?
I also wonder if you specify bottom connections to stumps/footings for timber floor frames and check the uplift capacity of the stumps/footings?
I am a structural engineer in Victoria designing an unusual timber-framed building and am having to check all bracing and hold-down connections…so just looking for a bit of general information.
Hi Damian
Thanks for your questions and comments. I’d love to have a chat about structural engineering, tie-down and bracing connections – it is something that we are particularly passionate about – especially with the recent passing of Tropical Cyclone Debbie… Call me a call one day for a chat.