cameroon gce advanced level 2025 building construction drawing 2

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QUESTION 1

Description

The drawing on fig 1 represents the ground floor plan of a duplex. The walls are of 15cm blocks. The headroom is 3.2m. The structure is built on isolated footings. The dimensions of the footings are 1.00x 1.20. The ground beam is of section 20×30. The pillars at the foundation level are 20x 32.5. Under the walls are foundation blocks of 20cm to depth of 66cm. Footings are 30cm thick and are formed at -1.15m, beginning with a 5cm lean concrete.

Technical information

Reinforcement of transversal beam axis-2

Span 1-2

• Main reinforcement (bottom bars) comprise of one bed 2HA12 with 135° hooks.
• Top reinforcement 2 beds. First bed 2HA12 second bed 2HA10.

  Span 2-3

• Top reinforcement 1 beds. First bed 2HA12 135° hooks.
• Bottom reinforcement 2 beds 1st bed 2HA12, 135° hooks. 2nd bed 2HA10, straight.

  Span 3-6

• Bottom reinforcement 1 bed 2HA12, with 135° hooks
• Top reinforcement 2 beds; 1st bed 2HA12 with 135° hooks, 2nd bed 2HA10 straight. The second bed overlaps into span 2 by 1.00m from the edge of the pillar,

Reinforcement of pillars

• Concrete cover 2.5cm
• Longitudinal reinforcement 6HA10, transversal reinforcement RL 6

WORK REQUIRED

On A3 vertical

1-1 Draw the foundation plan to scale 1:50 (20 marks)

1-2 Draw the reinforcement elevation of the foundation beam on axis B to scale 1:50 (10 marks)

1-3 Draw a section of reinforcement of span 2 close the support to scale 1:10 (10 marks)

1-4 Draw a section of beam reinforcement for span (two) 2 at midspan to scale 1:10 (10 marks)