Internal Code Checks
There are two groups of ACI 318 code checks that are performed internally within RAM Concrete Beam (that is, not requiring any user input to perform the check). A discussion and itemization of each follows:
Detailing Provisions
The following sections from ACI 318-99, Section 12.10, Development and Splices of Reinforcement, are implemented within the program:
- ACI 318-99 Sec. 12.10.3 - Flexural reinforcement must extend beyond the point at which it is no longer required to resist flexure for a distance larger than the effective depth of the member and 12 db.
- ACI 318-99 Sec. 12.11.1 - A minimum of ¼ of the number of bottom bars at mid span of the beam are made continuous through the beam. Please note that depending on the beam type and loading provisions in Section 7.13 and Chapter 21 (Special Provisions) the beam may require a larger number of continuous bars. The optimization and reinforcement check will use the controlling amount of continuous bottom bars.
Requirements for Structural Integrity
The following sections from ACI 318-99, Section 7.13, Details of Reinforcement, are implemented within the program:
- 7.13.2.1 - Members assigned and designed as joists will have at least one continuous bottom bar, which can be spliced at the support. The bar must end with a tension hook if it is at the end of the beam line.
- 7.13.2.2 - Perimeter beams must have at least 1/6 of the tension reinforcement required for negative reinforcement at the support continuous along the member and tied with closed stirrups along the full length. 135 degree stirrups can be used at support segments only. The optimization of the reinforcement places the splice in the mid span region but will not check for the location of the splice if the user moves it.
- 7.13.2.2 - Perimeter beams must have at least 1/4 of the tension reinforcement required for positive reinforcement along the mid span of the member made continuous along the member and tied with closed or 135 degree stirrups. The optimization of the reinforcement places the splice at the column support but will not check for the location of the splice if the user moves it.
- 7.13.2.3 - Non-Perimeter beams when close stirrups are not provided must have at least ¼ of the positive reinforcement required at mid-span made continuous along the member and spliced over the support with a Class A splice and terminated with a hook at the ends of the beam line. The optimization of the reinforcement places the splice at the column support but will not check for the location of the splice if the user moves it.