Rafi Bin Shahadat

Rafi Bin Shahadat Hey! I'm Rafi Bin Shahadat. Currently, I am working as a lecturer in the Department of Civil Engineering at Sonargaon University. Welcome to my personal blog ❕

16/04/2025

🎯 Unlock the Power of Arcs in AutoCAD! 🎯
Youtube Link: https://youtu.be/dw1nIZ-CdSE
In this step-by-step tutorial, learn how to design with different arc types in AutoCAD and master the essential techniques every civil engineering student, architect, or drafter should know. Whether you're a beginner or brushing up your CAD skills, this video covers it all – from 3-point arcs to center-based arc methods – explained in a simple and practical way.

🛠️ What You’ll Learn in This Video:
✅ All major types of arcs in AutoCAD
✅ How to draw each arc with real examples
✅ Practical tips for designing accurate curves
✅ Common mistakes to avoid while using arc commands
✅ Bonus pro tips for smoother drafting workflow

📌 Perfect For:

Civil Engineering Students

CAD Beginners

Architects & Designers

AutoCAD Enthusiasts

🎓 Improve your drawing accuracy and boost your design efficiency with these powerful arc tools in AutoCAD.

06/04/2025

🌀 Mastering Circles in AutoCAD
Circles may look simple, but did you know AutoCAD offers six different ways to draw them- each designed for specific situations?

In my latest video, I walk you through six practical methods to create circles in AutoCAD:
🔹 Center + Radius
🔹 Center + Diameter
🔹 2-Point Circle
🔹 3-Point Circle
🔹 Tangent-Tangent-Radius
🔹 Tangent-Tangent-Tangent

Youtube Link: https://youtu.be/zM2lGORkE4Y

Whether you're a civil or structural engineering student, or just stepping into the CAD world, knowing when and how to use each method can seriously improve your drafting efficiency and precision.

29/10/2024

Youtube Link: https://youtu.be/L4EublI1maY

Learn how to solve a simple manometer problem with this easy-to-follow tutorial. Whether you're a student or professional, this video breaks down the fundamentals of pressure calculations in manometry. We'll walk you through a step-by-step mathematical solution to help you master the concept. Perfect for engineering students and anyone preparing for exams. Don't forget to subscribe for more helpful tutorials on engineering concepts!

In this video, you'll learn:
1. How a simple manometer works
2. The mathematical principles behind pressure calculation
3. A detailed example problem and solution

Watch now and boost your understanding of fluid mechanics and pressure measurement.

26/10/2024

Youtube Link: https://youtu.be/1qR0B34XO_E

Mathematical Problem of Stream Ordering using Hortons Method.
In this video, I have discussed the topics-
i) No. of streams; ii) Average bifurcation ratio; iii) Average length ratio.
iv) Drainage density; v) Stream frequency; vi) Length of overland flow
v) Form factor (FF) and vi) Compactness constant (CC)

The video covers:
- Horton stream ordering
- Horton Stream ordering in Bangla
- Horton's method of stream ordering

If you miss Strahler's method, here is the link : https://fb.watch/vsbO8haloK/

'smethod

20/10/2024

Youtube Link: https://youtu.be/sAzXiYKkR04

Mathematical Problem of Stream Ordering using Strahler's Method.
In this video, I have discussed the topics-
i) No. of streams; ii) Avg. bifurcation ratio; iii) Avg. length ratio.
iv) Drainage density; v) Stream frequency; vi) Length of overland flow
v) Form factor (FF) and vi) Compactness constant (CC)

28/07/2024

The video contains why do we use extra top bar, crank bar, main bar, distribution bar and cover block in slab reinforcement.

16/07/2024

Brick is an artificial Kind of stone made from clay whose main characteristics are a plasticity when wet and stone like hardness after being heated to high temperature. In 100 cft brick works about 1150 nos bricks are used. The standard size of the brick is 9.5”X4.5"X2.75".
In this video, I will discuss different field test and lab tests of bricks, characterictics and constituents of bricks and manufacturing flow diagram. Hope you will learn the basic of bricks from the video.

14/07/2024

The use of lime in construction works began about 10000 years ago in Europe and the Near East. The ancient Egyptians used lime in the construction of Pyramids. Lime is known as impure CaO. It is produced from the burning process of limestone. Limestone is a natural stone that can be found in seashells, river bed and hilly areas. Nowadays, lime is replaced by cement in construction works. But it is being used in different purposes.
Engineering materials consist of four major materials- lime, cement, brick and concrete. In this video, I have discussed about Lime. I will also discuss about the other 3 materials very soon. Thank you

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