Propping / Needling
Propping & Needling Design
Openings, alterations and demolition supported properly — engineered load paths from the structure above down to ground that can carry them.
What this covers
Cutting a new opening or taking out structure means the loads have to go somewhere — deliberately. We design propping and needling schemes that trace the load path from the supported element to the ground: props, needles, spreader arrangements, foundations and the sequence that keeps everything stable at every stage.
- Needle beams through walls for new openings
- Vertical propping to floors, slabs and beams
- Flying and raking shores for temporary stability
- Back-propping through multiple levels
- Prop foundation and spreader design
- Installation, transfer and strike sequence
How we word it
- Loads are assessed from available drawings and stated assumptions — intrusive verification may be required.
- Coordination with the permanent works designer is expected for structural alterations.
- Subject to competent checking under the project temporary works procedure.
Typical deliverables
- Propping/needling calculations and arrangement drawings
- Load assessment of the supported structure (stated basis)
- Sequence for install, load transfer and removal
- Permit-to-load / strike interface and inspection points
Information we need for an accurate quote
Partial information is fine to start — we will tell you what matters most.
- What is being supported and what is being removed/altered
- Existing drawings or survey information (photos help)
- Construction of the supported element (materials, spans, storeys over)
- Proposed sequence and programme
- Permanent works designer involvement status
- Space constraints for props and foundations
Typical hold points & interfaces
- Props/needles installed and inspected before cutting or demolition
- Load transfer confirmed (permit-to-load) before removal of structure
- Strike only on permit after permanent works achieve capacity
When contractors use this
- A structural opening is being formed in a load-bearing wall
- Demolition or alteration needs temporary stability
- Floors must carry plant or materials beyond their design load
- The permanent works designer requires an engineered scheme
Move this forward
Send the item, the programme date and what information you already have (drawings, loads, ground info, constraints). You will get a practical view on scope, approach and turnaround.
Related services
Scope & competence note
Temporary Works Consulting & Design Ltd provides design, advisory, training and support services subject to agreed scope, competence requirements and project-specific information. Digital products, books, templates and tutoring support do not replace formal appointment, competent design review, independent checking, statutory duties or project-specific approval under the project temporary works procedure.
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Tell us the item, the programme date and what information you have. You will get a practical, honest response — not a sales pitch.