You can also give STRAP more control by specifying a range of allowable rebar diameters and spacings. The program will then search through these parameters to find the most economical combination that satisfies both the strength and crack width requirements.
For high-precision calculations, STRAP provides a specialized . This module determines long-term and short-term deflections by calculating the precise cracked section properties.
Flexural cracks appear vertically in regions of high bending moment and propagate from the tension face toward the neutral axis. Diagonal shear cracks develop at angles typically around 45 degrees near support zones due to diagonal tensile stress caused by the interaction of shear force and bending moment. Inadequate shear reinforcement—such as insufficient or incorrectly spaced stirrups—is a common cause of diagonal cracking, which often precipitates sudden, brittle failure if left unaddressed. atir strap and beamd with crack
A strap beam (also known as a tie beam or cantilever footing) connects an exterior column (often on a property line) to an interior column. Its purpose is to transfer the eccentricity-induced bending moment from the exterior footing to the interior one, ensuring a balanced load on the soil. Causes of Cracks in Strap Beams
[ Tension Zone / Service Loads ] │ ▼ ┌──────────────────────────────┐ │ ATIR STRAP Global Solver │ ──► Generates Moment & Shear Envelopes └─────────────┬────────────────┘ │ (Exports Element Forces) ▼ ┌──────────────────────────────┐ │ BEAMD Detailing Module │ ──► Calculates Neutral Axis & Steel Area (As) └─────────────┬────────────────┘ │ (Serviceability Limit State Check) ▼ ┌──────────────────────────────┐ │ Crack Width Code Enforcement │ ──► Controls crack parameter: w_max ≤ 0.2mm / 0.3mm └──────────────────────────────┘ You can also give STRAP more control by
If the crack is widening rapidly, immediately install temporary screwjack posts under the beam to relieve the load.
In structural engineering, the relationship between (often misspelled as "atirs"), or construction deficiencies:
Occur near the column support, indicating high shear forces.
Cracks in structural beams rarely happen without cause. They are usually a symptom of underlying structural, environmental, or construction deficiencies: