Project Details

G+2 Residential Building at

The Mambo Rectification Project involves the comprehensive structural redesign, architectural modification, and engineering standardization for a multi-storey (Ground + 2 Upper Floors) private residential building owned by Rev. Sahr Emmanuel Bona, situated in Mambo. Prepared by Kamandor Construction Procurement and General Supplies and verified by Realini Badar Associates Limited, the project translates architectural requirements into a structurally sound reinforced concrete (RC) framed development complete with detailed foundation, column, beam, slab, and 3D architectural deliverables.

The Challenge

Constructing or modifying a three-level residential structure in coastal terrain such as Mambo presents critical structural and spatial hurdles: Structural Load Transfer & Safety: Designing a multi-level structure with varying floor layouts, long-span communal areas (living rooms, verandas, dining spaces), and high roof/parapet loads requires careful load path distribution down to the foundation to prevent differential settlement or shear/flexural failures. Rectification & Standardization: Aligning the existing architectural vision with rigorous engineering standards (including reinforcement bar scheduling, proper concrete cover, link spacing, and moment-resisting beam/column connections) without sacrificing usable living space or functional floor plans. Site and Functional Demands: Accommodating multiple self-contained bedrooms, spacious balconies, integrated stair towers, and dedicated vehicular circulation and parking within a constrained residential compound.

The Solution

Kamandor Construction executed a full structural engineering rectification and redesign package. The solution introduced an isolated pad and combined footing foundation layout, reinforced concrete column schedules, a continuous moment-resisting beam network, two-way reinforced slabs, and 3D visualizations to guide on-site execution.

Optimized Substructure Design: Engineered 6 foundation pad types (BT 1 through BT 6) with depths up to 1,200 mm and footing dimensions ranging up to 1,500 mm × 1,500 mm, reinforced with high-yield bars (Y12 and Y16) to ensure bearing capacity and eliminate differential settlement.

Categorized RC Column Framework: Detailed 6 distinct column types (CT 1 to CT 6, totaling over 48 structural columns), specifying 4Y12, 4Y20, and 6Y20 longitudinal configurations with tightly spaced Y8 shear links (at 200 mm centers) to resist axial and lateral forces across all floor levels.

Continuous Beam Network: Designed over 30 primary and secondary beams (spanning 450 mm × 225 mm standard sections and deep 600 mm × 225 mm transfer/drop beams like BM 5 and BM 30) with top/bottom rebar detailing (Y12 and Y16 bars with Y8 links) to support floor slabs and span openings up to 8.7 meters.

150 mm Two-Way Slab Reinforcement: Standardized a suspended slab depth of 0.15 m across all levels using a dense, engineered top and bottom orthogonal rebar mat (Y12 bars spaced at 200 mm and 250 mm centers) to prevent sagging and control crack propagation.

Optimized Architectural Layout & Floor Zoning: Balanced functional spaces across the Ground, First, and Second floors—including master suites, living and dining halls, dedicated kitchens, balconies, and internal stairwells—while standardizing door openings at 2.1 m and floor-to-floor heights at 3.0 m.

3D Visualization and Boundary Integration: Developed isometric and perspective exterior renders to validate aesthetics, facade treatments, roof parapets (0.8 m), access gates, perimeter fences, and site vehicle circulation before physical execution.

Project Category :

Residential Building

Location :

Mambo Junction

Total Area :

71,740 km²

Duration :

In Progress

Scope of Work

Our comprehensive approach ensures every detail is meticulously planned and executed.

Architectural Assessment & Space Planning

Description: Evaluate site dimensions, functional needs, and boundary constraints to create refined Ground, First, and Second Floor architectural layouts featuring living zones, multiple en-suite bedrooms, kitchens, balconies, and stairwell circulation.

Elevation & Vertical Dimensioning Modeling

Description: Establish building elevations (North, South, East, West) and cross-sections (Sections A-A and B-B) defining standard 3.0 m floor-to-floor heights (totaling 9.0 m to the second floor), 2.1 m door head heights, 0.8 m parapet walls, and hipped roof configurations.

Geotechnical Interpretation & Foundation Layout Design

Detail the substructure layout using isolated and combined footings (Types BT 1–BT 6), mapping grid axes (1–12 and A–M), determining footing depths (-1,200 mm), specifying concrete blinding layers (75 mm), and detailing foundation mesh schedules.

Structural Column Scheduling & Reinforcement Detailing

Calculate column cross-sections and specify reinforcement schedules for CT 1 through CT 6, arranging main longitudinal reinforcement (4Y12, 4Y20, 6Y20) and confining stirrups (Y8 links at 200 mm pitch) to secure structural continuity through all floor levels.

Floor Framing & Beam Distribution Modeling

Develop the First Floor General Arrangement (GA) and detailed beam schedules for Beams BM 1 to BM 30, sizing beam cross-sections (450 mm × 225 mm and 600 mm × 225 mm) and placing tension, compression, and shear reinforcement to handle moment and shear stresses.

Suspended Slab Structural Reinforcement Detailing

Detail the 150 mm suspended reinforced concrete floor slabs by scheduling top (T1/T2) and bottom (B1/B2) reinforcement mats using Y12 rebar at 200 mm and 250 mm centers across all floor panels.

3D Visualization & Final Engineering Documentation

Produce multi-angle isometric 3D exterior renders showing the finished building envelope, boundary wall integration, paint finishes, and rooflines, followed by formal technical checking and quality endorsement by Realini Badar Associates Limited.

The Result

The project delivered a complete, permit-ready, and construction-grade engineering drawing package. By converting architectural plans into fully calculated structural schedules—spanning foundations, columns, beams, and slabs—the rectification design ensures that Rev. Sahr Emmanuel Bona's multi-level residential development possesses verified structural integrity, resistance against environmental and service loads, and clear, buildable documentation for the site construction team.