These are the handwritten notes for the Structural Analysis I course that was taught at Applied Science University by Dr. Peter Kattan in the period 1996-1998. The notes are based on the book "Structural Analysis " by Alexander Chajes, Second Edition. This book is currently out of print. Students find these notes useful and it is good to find them in one single volume. The author hopes to make these notes available to students worldwide and also to revive the Chajes book. These notes are for the first course on structural analysis for determinate structures. A sequel to this book can be found for indeterminate structures.