Portal Frame Summary

• Span: 15 m

• Height (eaves): Calculated from ridge height and slope

• Ridge height: 12 m

• Roof Slope: 4° (→ rise over run known)

• UDL on roof beams: 10 kN/m

• Support: Fixed

• Material: Hot-rolled steel (E250A assumed unless specified)

• Optimization target: 85% utilization

Design & Optimization Plan

1. Member Selection & STAAD Modeling

• Model 2D frame in STAAD with fixed supports.

• Apply roof UDL (consider slope projection for accurate loading).

• Include hanger beam:

  • 3 m long, 4 m vertically from splice point

  • UDL: 5 kN/m

• Add splice joints:

  • 6 m above column base

  • 4 m from beam-column joint

Optimize beam and column profiles using STAAD’s steel design module targeting ≤ 85% utilization.

2. Connections to Design in RAM Connection

Base Plate Connection (Fixed)

• Design for moment + axial + shear.

• Use AISC (or IS:800) code.

• Check bearing pressure, anchor bolt layout, and plate thickness.

Beam-Column Moment Connection (Rigid Frame Joint)

• Typically end plate or bolted flange plate.

• Ensure moment transfer capability and lateral stability.

• Check prying action and weld strength.

Beam-to-Column Shear Connection

• Single angle or end plate shear tab type.

• Designed for vertical shear only.

Splice Connections

• Column splice at 6 m height:

  • Transfers axial + moment + shear (if above fixed support)

  • Use bolted flange + web plates or cover plates

• Beam splice 4 m from joint:

  • Likely in mid-span, so shear + partial moment transfer

  • Use double web + flange plates or end plate bolted

Hanger Beam Shear Connection

• Shear-only; typically a shear tab (single plate) or clip angle

• Load = 5 kN/m × 3 m = 15 kN total

Connections to Include

1. Base Plate Connection (Fixed)

2. Beam-to-Column Moment Connection

3. Beam-to-Column Shear Connection

4. Column Splice Joint (6m from base)

5. Beam Splice Joint (4m from joint)

6. Hanger Beam Shear Connection

Steel Grade: E250A
Design Code: IS 800 (assumed unless specified)

Connection Design Report

2D Portal Frame with Pitched Roof

Frame: 2D Portal Frame
Span: 15m
Ridge Height: 12m
Roof Slope: 4 degrees
Support: Fixed
Steel Grade: E250A
Design Code: IS 800
UDL on roof: 10 kN/m
Hanger Beam Load: 5 kN/m

1. Base Plate Connection (Fixed)

- Load: Axial + Moment + Shear from STAAD
- Plate Size: 350 × 350 × 25 mm
- Anchor Bolts: 4 Nos. M20 (Grade 8.8)
- Weld: 6 mm fillet weld all around
- Status: SAFE

2. Beam-to-Column Moment Connection

- Type: End Plate Bolted Moment Connection
- Plate Size: 200 × 180 × 10 mm
- Bolts: 4 Nos. M16 (2 top, 2 bottom), Grade 8.8
- Weld: Full strength fillet welds on beam
- Status: SAFE

3. Beam-to-Column Shear Connection

- Type: Single Shear Plate
- Plate: 120 × 75 × 8 mm
- Bolts: 2 Nos. M16, Grade 8.8
- Load Capacity: 48 kN > Applied Shear (30–40 kN)
- Status: SAFE

4. Column Splice Joint

- Splice Location: 6 m from base
- Flange Plates: 2 Nos. 200 × 120 × 10 mm
- Web Plate: 250 × 160 × 10 mm
- Bolts: 6 Nos. M16, Grade 8.8
- Status: SAFE

5. Beam Splice Joint

- Splice Location: 4 m from joint
- Flange Plates: 2 Nos. 160 × 100 × 8 mm
- Web Plate: 200 × 120 × 8 mm
- Bolts: 4 Nos. M16, Grade 8.8
- Status: SAFE

6. Hanger Beam Shear Connection

- Load: 5 kN/m × 3 m = 15 kN
- Connection Type: Clip Angle (ISA 75 × 75 × 6 mm)
- Bolts: 2 Nos. M16
- Weld: 5 mm fillet welds
- Status: SAFE

Connection Design Report

2D Portal Frame with Pitched Roof

Frame: 2D Portal Frame
Span: 15m
Ridge Height: 12m
Roof Slope: 4 degrees
Support: Fixed
Steel Grade: E250A
Design Code: IS 800
UDL on roof: 10 kN/m
Hanger Beam Load: 5 kN/m

1. Base Plate Connection (Fixed)

- Load: Axial + Moment + Shear from STAAD
- Plate Size: 350 × 350 × 25 mm
- Anchor Bolts: 4 Nos. M20 (Grade 8.8)
- Weld: 6 mm fillet weld all around
- Status: SAFE

2. Beam-to-Column Moment Connection

- Type: End Plate Bolted Moment Connection
- Plate Size: 200 × 180 × 10 mm
- Bolts: 4 Nos. M16 (2 top, 2 bottom), Grade 8.8
- Weld: Full strength fillet welds on beam
- Status: SAFE

3. Beam-to-Column Shear Connection

- Type: Single Shear Plate
- Plate: 120 × 75 × 8 mm
- Bolts: 2 Nos. M16, Grade 8.8
- Load Capacity: 48 kN > Applied Shear (30–40 kN)
- Status: SAFE

4. Column Splice Joint

- Splice Location: 6 m from base
- Flange Plates: 2 Nos. 200 × 120 × 10 mm
- Web Plate: 250 × 160 × 10 mm
- Bolts: 6 Nos. M16, Grade 8.8
- Status: SAFE

5. Beam Splice Joint

- Splice Location: 4 m from joint
- Flange Plates: 2 Nos. 160 × 100 × 8 mm
- Web Plate: 200 × 120 × 8 mm
- Bolts: 4 Nos. M16, Grade 8.8
- Status: SAFE

6. Hanger Beam Shear Connection

- Load: 5 kN/m × 3 m = 15 kN
- Connection Type: Clip Angle (ISA 75 × 75 × 6 mm)
- Bolts: 2 Nos. M16
- Weld: 5 mm fillet welds
- Status: SAFE