The Steel Designer's Handbook - published by the Steel Construction Institute. There are many books on the subject, just go into any University library and look under "Steel", but this book is a good place to start.
Try also a very classical book by Omer W. Blodgett, Design of welded structures, Lincoln Welding Society. Next, why dont you also take a look at AISC Manuals, they have got great detailing principles in there.
You might find this Excel Template from Techno Consultants Ltd of interest. It deals with the Analysis & Design of Weld Groups Subjected to Simultaneous Shear, Bending, Torsion and Axial Loading.
The weld groups can have any configuration of multi-linear weld lengths in an x-y plane.
It uses the elastic method to analyse weld groups subjected to simultaneous tension, compression, shear, bending and or torsion in x, y and z directions. If present, the influence of unsymmetrical bending is taken into account in the analysis.
Features
The file size is under 450 KB. At 3 KB/second, your download time would be about 3 minutes.
Comprehensive documentation and sketches included within the template file to describe the analysis method and to serve as reference during interactive use.
Sign convention for applied loads illustrated via 3D-Sketch on the screen and in the printed output for ease of use and ready reference.
All calculation components shown on the screen and in the printed output. The user and the checker both can verify results by hand calculations.
On the spot screen display of background information via comments, when moving the mouse pointer over cells.
At each weld node, calculation and display of induced stresses.
At each weld length, calculation and display of the load carried in x, y and z direction.
The influence of unsymmetrical bending is taken into account, when present.
Applied Loading: Point loads Fx, Fy and Fz and Moments Mx, My and Mz
