CSLB C-27 Landscaping ContractorPlanning and EstimatingMedium
A C-27 contractor is reviewing a landscape design plan for a large commercial property. The plan includes a significant amount of concrete paving for walkways and patios. The specifications require a minimum compressive strength of 3,000 psi for all concrete. What is the MOST critical information the contractor needs to verify during the planning and estimating phase to ensure this specification is met and to accurately bid the work?
- AThe availability of local concrete suppliers who can deliver 3,000 psi concrete.
- BThe aesthetic finish and color specified for the concrete.
- CThe type of aggregate to be used in the concrete mix design.
- DThe required curing method and duration for the concrete.
Show answer & explanationAnswer & explanation
Correct answer: A. The availability of local concrete suppliers who can deliver 3,000 psi concrete.
While all options are relevant to concrete work, ensuring that local suppliers can actually provide concrete meeting the specified compressive strength (3,000 psi) is paramount. If such concrete is not readily available or requires special ordering, it directly impacts cost, lead time, and the feasibility of meeting the specification, making it a critical bidding factor.
Why the other options are wrong
- B. Aesthetic finish is important for client satisfaction but doesn't directly address the structural specification.
- C. Aggregate type is part of the mix design, but the primary concern is the final strength, which the supplier guarantees.
- D. Curing methods affect quality and schedule but are secondary to the initial availability of the correct strength concrete.
Specified Material Verification
The process of confirming that specified construction materials (e.g., concrete strength, specific plant varieties) are available from suppliers and can be procured within project constraints.
- Ensures compliance with design specifications.
- Impacts material cost, lead time, and project schedule.
- Requires communication with material suppliers.
Memory trick: Specs are king; find a supplier who can bring the right thing.