Structural Analysis & Optimization for Steel Structures
Budget: $30 – $250 USD
Hello,
I am looking for an experienced structural engineer specialized in steel structure design to perform:
• Full 3D structural modeling (ETABS / SAP2000 / STAAD or similar)
• Complete structural analysis
• Section verification and economic optimization
Workshop drawings are NOT required.
The steel manufacturer will handle fabrication drawings.
The scope is analysis, verification, and optimization only.
⸻
Project Data
Building Dimensions:
• Length: 51 meters
• Width: 27 meters
Grid System:
• 9 axes along the 51 m direction
• 6 axes along the 27 m direction
Heights:
• Eave height: 7.0 m
• Ridge height: 8.4 m
Roof System:
• Lightweight steel sheet roof with thermal insulation
⸻
Structural System and Phases
Phase 1 (Current Stage – Roof Only)
• External columns only
• The 27 m width is divided into 5 bays for the external frames
• No internal columns at this stage
Future Phase
• Removal of the existing roof rafter system
• Installation of internal columns
• The 27 m width will then be divided into 4 bays for upper floors
• Construction of a first floor (light load)
• Construction of a second floor (light load)
• Existing ground floor columns must be designed to safely carry the final phase loads
⸻
Bracing System
• 3 X-Bracing bays on each longitudinal side (51 m sides)
• 1 Bracing bay on each short side (27 m facades)
The bracing system must be fully considered in the structural analysis.
The engineer must clearly define whether the final structural system behaves as:
• Portal Moment Frame
or
• Hinged + Braced Frame
⸻
Foundations (Already Constructed)
Plain Concrete (PC):
• 2.70 × 2.20 × 0.40 m
Reinforced Concrete Footing (RC):
• 2.10 × 1.60 × 0.60 m
• Reinforcement: Ø12 @ 16–17 cm each direction (bottom mesh)
Pedestal:
• 40 × 60 cm
• Height: 1.5 m
Anchor Bolts:
• 6 × M24
• 80 cm embedment depth
Allowable Soil Bearing Capacity:
• 150 kN/m²
⸻
Current Proposed Steel Sections (To Be Verified)
External Columns:
• Built-up I-section 400 × 300 × 8 × 6 (h × b × tw × tf)
Rafter:
• Main depth: 500 mm
• Haunch depth at knee: 700 mm
• Flange width b = 200 mm
• Web thickness = 8 mm
• Flange thickness = 10 mm
All sections must be checked and optimized if necessary.
⸻
Scope of Work Required
The engineer must:
1. Create a complete 3D model for both construction phases
2. Include the full bracing system in the model
3. Apply wind loads in both directions
4. Calculate and verify:
• Axial forces (Pu)
• Bending moments (Mu)
• P-M interaction
• Slenderness ratio (KL/r)
• Column buckling
• Lateral torsional buckling (LTB) for rafters
• Base reactions (qmax and qmin)
• Foundation eccentricity
• Punching shear
• Anchor bolt tension
5. Provide economic optimization of steel sections with a target utilization ratio between 0.85 and 0.95 (not overly conservative design).
⸻
Required Deliverables
• Structural model file
• Structural calculation report (PDF)
• Summary tables including forces, moments, and utilization ratios
• Confirmation of structural system type (Portal vs Braced)
• Confirmation of bracing adequacy in both directions
⸻
Please provide:
• Examples of similar completed projects
• Software to be used
• Estimated delivery time
• Your proposed fee
I am looking for an experienced structural engineer specialized in steel structure design to perform:
• Full 3D structural modeling (ETABS / SAP2000 / STAAD or similar)
• Complete structural analysis
• Section verification and economic optimization
Workshop drawings are NOT required.
The steel manufacturer will handle fabrication drawings.
The scope is analysis, verification, and optimization only.
⸻
Project Data
Building Dimensions:
• Length: 51 meters
• Width: 27 meters
Grid System:
• 9 axes along the 51 m direction
• 6 axes along the 27 m direction
Heights:
• Eave height: 7.0 m
• Ridge height: 8.4 m
Roof System:
• Lightweight steel sheet roof with thermal insulation
⸻
Structural System and Phases
Phase 1 (Current Stage – Roof Only)
• External columns only
• The 27 m width is divided into 5 bays for the external frames
• No internal columns at this stage
Future Phase
• Removal of the existing roof rafter system
• Installation of internal columns
• The 27 m width will then be divided into 4 bays for upper floors
• Construction of a first floor (light load)
• Construction of a second floor (light load)
• Existing ground floor columns must be designed to safely carry the final phase loads
⸻
Bracing System
• 3 X-Bracing bays on each longitudinal side (51 m sides)
• 1 Bracing bay on each short side (27 m facades)
The bracing system must be fully considered in the structural analysis.
The engineer must clearly define whether the final structural system behaves as:
• Portal Moment Frame
or
• Hinged + Braced Frame
⸻
Foundations (Already Constructed)
Plain Concrete (PC):
• 2.70 × 2.20 × 0.40 m
Reinforced Concrete Footing (RC):
• 2.10 × 1.60 × 0.60 m
• Reinforcement: Ø12 @ 16–17 cm each direction (bottom mesh)
Pedestal:
• 40 × 60 cm
• Height: 1.5 m
Anchor Bolts:
• 6 × M24
• 80 cm embedment depth
Allowable Soil Bearing Capacity:
• 150 kN/m²
⸻
Current Proposed Steel Sections (To Be Verified)
External Columns:
• Built-up I-section 400 × 300 × 8 × 6 (h × b × tw × tf)
Rafter:
• Main depth: 500 mm
• Haunch depth at knee: 700 mm
• Flange width b = 200 mm
• Web thickness = 8 mm
• Flange thickness = 10 mm
All sections must be checked and optimized if necessary.
⸻
Scope of Work Required
The engineer must:
1. Create a complete 3D model for both construction phases
2. Include the full bracing system in the model
3. Apply wind loads in both directions
4. Calculate and verify:
• Axial forces (Pu)
• Bending moments (Mu)
• P-M interaction
• Slenderness ratio (KL/r)
• Column buckling
• Lateral torsional buckling (LTB) for rafters
• Base reactions (qmax and qmin)
• Foundation eccentricity
• Punching shear
• Anchor bolt tension
5. Provide economic optimization of steel sections with a target utilization ratio between 0.85 and 0.95 (not overly conservative design).
⸻
Required Deliverables
• Structural model file
• Structural calculation report (PDF)
• Summary tables including forces, moments, and utilization ratios
• Confirmation of structural system type (Portal vs Braced)
• Confirmation of bracing adequacy in both directions
⸻
Please provide:
• Examples of similar completed projects
• Software to be used
• Estimated delivery time
• Your proposed fee