On a set of engineering drawings (Drawing no

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On a set of engineering drawings (Drawing no. S-05 Slab plan - first floor) for a project ("Central supermarket") on which you are working, a reinforced concrete floor slab spans over a grid of steel beams spaced at 6 metres in each direction. The drawings say that the slab is 120 mm thick and has N20 bars running in two directions both top and bottom of the slab (two-way spanning and continuous). In the specifications, cover to the reinforcement is noted as 30 mm top and 20 mm bottom and the concrete strength is noted as 32 MPa. The slab is an internal slab with no external exposure. (Note that you do not need to access this drawing to completed this question)

a. Although preparations for this stage of the job are some weeks away yet, compose two points that you wish to discuss with the engineer responsible for the design to address your concerns that there may be an error.

b. Forward an email to your concreting subcontractor, informing them that there is an issue with the concrete slab thickness and/or concrete cover on one of the drawings, and that you are going to contact the engineer. You should inform the concretor that there may be changes to be made and that you will require a revised quote once you have received a response from the engineer. Be very clear and respectful in your communications; it is very important that your concretor understands the issue and that no problems arise later. Although your concretor has shown absolute competence in the job so far, they are not a native english speaker.

As teacher mentioned do not need to access this drawing to completed this question. I don't have this drawing paper is well