Contemporary Steel Design Vol.1 No.4
From 911Encyclopedia
http://www.engr.psu.edu/ae/WTC/AISI/wtcaisicover.pdf
http://www.engr.psu.edu/ae/WTC/AISI/wtcaisi1.pdf wtcaisi1.pdf
http://www.engr.psu.edu/ae/WTC/AISI/wtcaisi2.pdf wtcaisi2.pdf
http://www.engr.psu.edu/ae/WTC/AISI/wtcaisi3.pdf wtcaisi2.pdf
http://www.engr.psu.edu/ae/WTC/AISI/wtcaisi4.pdf wtcaisi4.pdf
http://www.engr.psu.edu/ae/WTC/AISI/wtcaisi5.pdf wtcaisi5.pdf