In this guide
Use this material to examine your own work. Confirm current requirements, forms and dates with IStructE before applying.
Allow about half an hour for this ten-mark section. The examiners emphasise technical understanding over polished prose.
Keeping amendments within the brief
Propose changes to the layout, spans, grid, geometry, levels or zoning while retaining the required function. List the stated constraints and check each proposal against them. Give specific engineering advice with a quantified change where possible.
Explaining each proposal
State the change, how it would save material and what it would mean for the client. For example, compare "reduce spans" with "reduce the main span from 15 m to 12 m by adding a line of columns on grid C".
Explain the saving through shallower beams, reduced reinforcement, smaller foundations or a lighter frame. Estimate its magnitude where you can, then discuss any loss of flexibility, headroom, layout or operational capacity. The instructions require the impact on operation and the rest of the design. Three developed proposals can be more useful than six with little explanation.
Writing the response
A letter or email is acceptable. Address and head it appropriately, and keep within the thirty minutes available in the seven-hour day. Recommend changes, explain their consequences and state the decisions needed from the client. Reference sketches or a marked-up plan where these make a change clearer.
Section 1b
Look for
- List the brief's stated constraints first, and check every proposal against them
- Propose specific, quantified layout changes
- State the material saving and the mechanism behind it
- State the impact on the client's operation honestly
- Reference a sketch where it explains a layout change quickly
Watch for
- Change what the structure is for
- Breach a constraint the question told you to maintain
- Write at length about how important sustainability is
- Propose changes with no engineering consequence attached
- Spend an hour on ten marks
Two amendments, same brief
Fictional example: a distribution warehouse where the brief requires a clear internal height of 12 m and column-free loading aisles
"We would recommend reducing the spans and using less material where possible, which would improve the sustainability of the scheme and reduce cost. We could also consider alternative materials with lower embodied carbon."
"Two changes would cut material significantly while keeping your 12 m clear height and column-free aisles. First, moving the office block from the centre of the north elevation to a separate single-storey annexe removes the transfer structure over it — about 40 tonnes of steel — at the cost of roughly 200 m² of additional footprint. Second, if the racking layout can accept a 24 m rather than a 30 m portal span, the frame weight falls by around a fifth; this would add one line of columns outside the aisles, which I understand your operation can accommodate, but I would want to confirm that with your logistics team before proceeding."
The second version proposes two specific changes, states the mechanism and rough magnitude of the saving, respects both stated constraints, and is honest about what each costs the client, including flagging the one that needs their decision. The first proposes nothing that could be acted on.
Official sources
Selected publisher pages were rechecked in September 2026. Other source records were last checked in July 2026. Open the latest official document before relying on a requirement.