Based on the provided reference, the minimum spacing of vertical stirrups specified is 100 mm c/c (center to center).
Understanding Stirrup Spacing
Stirrups are essential steel reinforcement elements in concrete beams that resist shear forces and help hold the main longitudinal reinforcement bars in place. Proper spacing is critical for the structural integrity of the beam. The minimum and maximum spacing requirements are typically governed by building codes and design specifications, based on factors like beam dimensions, concrete strength, steel yield strength, and applied loads.
According to the information provided:
- The spacing of vertical stirrups should be 100 mm c/c through out the length of lapping.
- Additionally, 8 mm diameter U-hooks should be erected at 100 mm spacing from beams/slabs in specific areas (like walls at verandahs) as shown in associated figures.
- The minimum size of stirrups mentioned is 8 mm diameter.
This reference specifies a minimum spacing of 100 mm c/c specifically within the length where reinforcement bars are lapped (overlapped to transfer stress) and for related components like U-hooks near beam/slab connections in certain contexts.
While design codes provide comprehensive rules for stirrup spacing along the entire length of a beam (which varies based on shear force diagrams, often closer near supports and wider towards the mid-span), the provided reference focuses on a specific minimum spacing requirement in the context of lapping zones and certain connection details.
Key Points from the Reference
- Specific Minimum Spacing: 100 mm c/c
- Applicability:
- Throughout the length of lapping of reinforcement bars.
- For 8 mm diameter U-hooks erected from beams/slabs at specific locations (e.g., walls at verandahs).
- Minimum Stirrup Size: 8 mm diameter.
It is important to note that general building codes will provide detailed requirements for stirrup spacing under various shear loads and beam configurations, which may include different minimums and maximums along the beam length. The reference specifically highlights the 100 mm c/c requirement in particular zones.
