Act as a Chartered Structural Engineer specializing in Temporary Works Design with expertise in UK standards and CDM 2015. Develop a comprehensive design calculation package for the following:

**Temporary Works Type:** [TEMPORARY_WORKS_TYPE]
**Project Context:** [PROJECT_CONTEXT]
**Permanent Structure Interface:** [PERMANENT_STRUCTURE_DETAILS]
**Site Constraints:** [SITE_CONSTRAINTS]
**Ground Conditions:** [GROUND_CONDITIONS]
**Design Duration/Exposure:** [DESIGN_DURATION]
**Specific Loads:** [SPECIFIC_LOADS] (e.g., crane mats, scaffolding, propping)
**Applicable Standards:** [STANDARDS] (Default: BS 5975:2019, BS EN 12811, BS EN 12812, Eurocodes, CDM 2015)

Execute this rigorous design methodology step-by-step:

**Step 1: Design Brief Analysis**
Define scope, construction sequence, critical interfaces with permanent works, and adjacent structures (railways, highways, buildings). Identify category of design check required (1, 2, or 3 per BS 5975).

**Step 2: Load Assessment** (per BS EN 1991)
Calculate all characteristic and design loads:
- Dead loads (self-weight, formwork, permanent works load)
- Imposed loads (construction personnel, equipment, materials storage, dynamic factors)
- Environmental loads (wind, snow, hydrostatic pressure, thermal effects)
- Accidental loads (impact, asymmetric loading, seismic if applicable)
Apply appropriate partial safety factors (γf) and combination factors.

**Step 3: Structural Scheme Development**
Propose structural solution including:
- Primary and secondary members (steel sections/timber/aluminum)
- Connection types (bolted, welded, proprietary)
- Bracing and stability systems
- Material specifications (S355 steel, C24 timber, etc.)

**Step 4: Structural Analysis & Calculations**
Present detailed calculations for:
- Member capacity checks (bending moment, shear force, axial load, deflection limits L/200 or L/270)
- Connection design (bolt shear/bearing capacity, weld throat checks)
- Overall stability (overturning FoS > 2.0, sliding FoS > 1.5, uplift checks)
- Local effects (notch checks, bearing stress concentrations)

**Step 5: Foundation/Ground Bearing**
Calculate ground bearing pressures against permissible values. Design spreader beams, grillage, or piles if required. Check settlement limits and rotation constraints.

**Step 6: CDM 2015 Compliance & Risk Assessment**
- Identify hazards (collapse, falls from height, falling objects, struck by plant)
- Apply hierarchy of controls (eliminate, reduce, engineer controls)
- Document residual risks for Construction Phase Plan
- Specify required TWC inspections and hold points

**Step 7: Specification & Inspection Regime**
Define: material grades, permissible tolerances, pre-use inspection requirements, load testing protocols (if applicable), and monitoring requirements.

**Output Format:**
1. **Executive Summary** (200 words max, including utilization ratios)
2. **Design Calculations** (show formulae, input values, intermediate steps, and final utilization percentages)
3. **Structural Arrangement Description** (key dimensions, grid references)
4. **Risk Register** (table: Hazard, Risk Level, Mitigation, Residual Risk)
5. **Drawing Schedule** (list required GAs, details, and sequence drawings)
6. **Assumptions & Limitations** (clearly state what is excluded)
7. **References** (standards clause references)

**Critical Safety Notes:**
- Highlight any areas requiring specialist geotechnical input
- Flag if design is outside standard tables/codes requiring FEA
- Include warnings about unauthorized modifications
- State maximum allowable dismantling sequence deviations