CSLB Class B General Contractor's License Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Prepare for the CSLB Class B General Contractor's License Test with interactive flashcards and multiple choice questions. Each question offers hints and explanations to enhance your understanding and readiness for the exam.

Practice this question and more.

What is the recommended grid spacing for foundation or slab rebar?

With a minimum of 10" O.C.
16" to 18" square
24" to 30" square
Custom based on the structure

The correct answer is: 16" to 18" square

The recommended grid spacing for foundation or slab rebar typically ranges from 16" to 18" square. This spacing is based on standard building practices and structural engineering guidelines to ensure adequate support and load distribution across the foundation. Proper spacing is essential to maintain the structural integrity of the slab and to prevent cracking under loads. Choosing a grid spacing of 16" to 18" helps to balance the strength and flexibility of the concrete, allowing for tensile reinforcement without creating excessive congestion that might complicate the pour or result in poor curing conditions. This range is widely accepted in the industry as providing sufficient support for typical residential and commercial slabs. Custom spacing might be necessary for unique structural considerations, but the standard spacing is designed to work effectively for most general slab construction scenarios, making the 16" to 18" square configuration a reliable standard for contractors to follow.