Introduction Post-installed and cast-in-place anchors play a critical role in transferring forces from structural and non-structural components into concrete. Despite their widespread use in industrial facilities, equipment foundations, steel structures, pipe racks, machinery supports, and seismic anchorage systems, anchor design remains one of the most misunderstood and error-prone aspects of structural engineering. Traditional anchor design approaches often rely on simplifi

Adisorn Owatsiriwong Engineering Challenges in Modern Steel Girder Design Designing steel runway beams, crane girders, transfer girders, and long-span steel beams is often an iterative process involving repeated structural analysis, code checks, and section revisions. Engineers must evaluate numerous load combinations, serviceability requirements, and stability failure modes while maintaining economical fabrication costs. Traditional workflows typically require multiple softw

Adisorn Owatsiriwong ALPS CONSULTANTS Introduction Reinforced concrete corbels are among the most challenging structural elements to design correctly. Although relatively small in size, corbels are subjected to highly concentrated loads and complex stress distributions that cannot be accurately represented using conventional beam theory. In precast concrete construction, industrial facilities, bridge structures, transfer systems, and heavy equipment supports, corbels play a c

Adisorn Owatsiriwong At ALPS Consultants, we continue to develop practical engineering tools that help engineers perform rigorous calculations efficiently while maintaining a clear understanding of structural behavior. We are pleased to introduce LEDGE-STM™, a new design tool developed as part of the ALPS ACI 318-25 Concrete Calculation Tools suite. LEDGE-STM™ is designed specifically for the analysis and design of: Reinforced concrete beam ledges Bearing ledges Precast beari

Adisorn Owatsiriwong ALPS CONSULTANTS Introduction Underground reinforced concrete tanks are among the most common structures encountered in industrial, infrastructure, water treatment, wastewater treatment, fuel storage, and utility projects. Despite their apparent simplicity, their structural behavior can be surprisingly complex. A typical underground tank consists of: - Base slab - Side walls - Top slab - Internal partitions - Pile-supported foundation system - Soil and gr

Introduction Our engineering philosophy is to conduct structural analysis and design verifications using a transparent, knowledge-based process. FRAME2D-OP is a MATLAB code created by ALPS Consultants to combine classical plane frame finite element analysis with modern optimization techniques. The objective is simple: automate repetitive structural design iterations while maintaining engineering transparency and control. Unlike commercial software that focuses primarily on an

Adisorn Owatsiriwong ALPS Consultants Why We Studied This ACI 318 does not explicitly define a minimum flexural reinforcement ratio specifically for pile caps. Many designers adopt values such as 0.0018 or 0.0020 without examining the post-cracking flexural reserve. This study compares flexural strength (φMn) and cracking moment (Mcr) using FS = φMn/Mcr. Key Findings Condition Recommended Ratio fc' = 30 MPa, d ≈ 1.0 m, FS > 1.0 ρ ≥ 0.0020 (ρ = As/bd) fc' = 30 MPa, d ≈ 1.0 m,

Design Faster with Confidence Practical Structural Engineering Software for Everyday Design Modern structural engineering demands more than manual calculations and spreadsheet templates. Engineers must deliver safe, economical, and code-compliant designs while meeting increasingly tight project schedules. To address these challenges, ALPS Consultants has developed a suite of specialized ALPS's ACI 318-25 Design Tools focused on the most frequently used reinforced concrete str

Design Faster with Confidence In foundation engineering, there is often a gap between simplified hand calculations and large-scale finite element software. Engineers need a tool that is fast, practical, and easy to use for everyday projects without spending hours building complex models. RAFT-FEM™ Mat Foundation Analysis was developed to bridge that gap. The software provides rapid finite element analysis of mat foundations, pile-supported mats, and pile raft foundations, all

Transforming Pile Foundation Design Through Engineering Intelligence Modern construction projects demand more than conventional pile foundation design. Increasing structural complexity, tighter schedules, seismic requirements, and cost pressures require engineers to evaluate thousands of design possibilities efficiently while maintaining compliance with design standards. To address these challenges, ALPS Consultants has developed PILE-OP™, an advanced pile foundation optimiza

Automated Optimization-Based Steel Connection Design Engineering the Most Efficient Connection — Automatically Steel connection design is often one of the most labor-intensive parts of a structural steel project. Engineers must repeatedly determine bolt sizes, bolt layouts, connection plate dimensions, and weld requirements while ensuring compliance with design standards and fabrication constraints. To streamline this process, ALPS CONSULTANTS has developed the CONNECT-OP™ H-

Figure. Rotated Pilecaps and Non-orthogonal strap beam grid (alps consultants, 2026) Introduction to PILE-GRID™ Overview PILE-GRID™ is an automated finite element analysis and design platform developed by ALPS CONSULTANTS to support the assessment, verification, and remedial design of pile foundation systems affected by pile construction deviations. The software was specifically created to address a practical gap in foundation engineering, where pile installation tolerances

In modern foundation construction, pile deviation is unavoidable. Survey tolerances, drilling shifts, obstruction avoidance, and site limitations often cause pile positions to deviate from the original design layout. Traditionally, engineers must manually evaluate these deviations, revise pile reactions, check eccentricities, and redesign pile caps — a process that is time-consuming, repetitive, and highly dependent on engineering judgment. Our PILE-DEV Deviation Analysis Too

A built up box column supports a 16.5 m-tall signboard (Fig. 1) designed in accordance with AISC 360-16 specifications. An all-in-one MATLAB code for wind load analysis and design is developed and used to investigate the box section as shown in Fig. 2. Fig. 1 Signboard Structure Fig. 2 Box column section Based on AISC 360, this column has a slender element in compression, and a non-compact flange due to Mny. The demand/capacity ratio (DCR) can be computed from the

Adisorn Owatsiriwong ALPS Consultants Introduction An underground water tank’s wall is a 2D structure that requires detailed analysis using design charts or sophisticated FEM modeling, e.g., SAP2000. This time-consuming process requires a structural engineer to model the tank geometry and provide triangular load definitions to the model. In this project, we use the Reisner-Mindlin plate element (Bathe, 1996; Bishoff, 2002) to develop a handy FEM tool for water tank analysis

A technical blog on automated reinforced concrete drilled pier design using strain compatibility and interaction diagram checking Introduction Drilled piers are commonly used as deep foundations for buildings, bridges, industrial structures, retaining systems, and heavy equipment foundations. In many practical projects, drilled piers are subjected not only to axial compression but also to bending moment from lateral loads, column eccentricity, seismic effects, wind, or constr

Nonlinear dynamic analysis plays an important role in seismic performance evaluation of structures. The solution of nonlinear dynamic can be solved by using Newmarks's method. This article provides a 1-DOF cookbook for review purposes and to provide basic knowledge for multi-DOF problems. The algorithm consists of Newmark loop and Newton loop as Time Integration (Newmark) └── for each time step └── Newton Iteration └── Stress Return Mapping

Adisorn Owatsirwong, D.Eng. This equivalent nodal force is opposite to Fixed-end reactions and written in the element force calculation as follows. {Fe} = [ke]{u} - {q} {q} = Equivalent nodal force When assembling the element stiffness, those {q} are summed into the global load vector {F}, i.e. {F} + {Q}= [K]{u} [F] = Nodal applied load {Q} = Sum of equivalent nodal load vector [K] = The global stiffness of the structure MATLAB Code (case qe = q) function feq = eqv_load_dro

Shear reinforcement in a concrete beam is required when the shear strength of concrete alone is inadequate to carry the vertical shear from external loads. ACI 318 stipulates the general equation for computing the vertical shear strength of a concrete beam with inclined stirrups as follows. Vs = As*fy*d/s*(sin(a) + cos(a)) where a = horizontal angle of the inclined stirrup It's first astonishing to see the term cos(a) for the shear strength of the stirrup, which should only b

Artificial Intelligence is being advanced to the point where engineering design can be automated to an unprecedented extent. Within a...