Construction Documentation & Implementation in Certified Landscape Architect (CLA Practice Test Exam) Flashcards

Which type of joint in concrete paving is designed to control cracking by creating a plane of weakness where cracks can occur predictably?

Answer: Control (contraction) joint

Control or contraction joints are tooled or sawn into concrete to predetermine where shrinkage cracks will form, keeping them neat and predictable.

When specifying tree planting depth in construction documents, the critical reference point for finished grade is:

Answer: The root flare (root crown) at or slightly above finished grade

Trees must be planted so the root flare is at or 1–2 inches above finished grade to prevent crown rot and girdling root development.

What is the function of a 'cost estimate' produced at the schematic design phase versus one produced at the construction document phase?

Answer: Schematic estimates are order-of-magnitude for budget setting; CD-phase estimates reflect actual quantities and unit costs for bidding

Schematic-phase estimates use conceptual unit costs for budget validation, while CD-phase estimates are based on quantified takeoffs and current market pricing for accurate bid comparison.

A 'bid alternate' in a landscape construction bid package is:

Answer: An optional add or deduct item priced separately so the owner can adjust scope based on budget

Bid alternates allow owners to accept or reject specific scope items (add-alternates increase scope; deduct-alternates reduce it) without re-bidding the entire project.

Which irrigation component is used to prevent backflow of potentially contaminated irrigation water into the potable water supply?

Answer: Backflow preventer (RPZ or DCVA)

A backflow preventer—such as a reduced pressure zone (RPZ) or double check valve assembly (DCVA)—is required by plumbing codes to protect potable water from irrigation system contamination.

In construction documents, 'typical details' (TYP.) indicate that:

Answer: The same detail applies to multiple similar conditions throughout the project

A detail labeled 'TYP.' (typical) instructs the contractor to apply that same detail at all similar conditions on the project, reducing drawing redundancy.

Which document amendment issued during bidding corrects errors, adds information, or changes the bid documents before bids are submitted?

Answer: Addendum

An addendum is issued during the bidding period to correct, clarify, or change the bid documents; all bidders must acknowledge receipt for bids to be valid.