Well, I haven´t figured out how to do this because there are several different options. The easiest was to list publication dates of all books with Concrete stories in it so that is what I did first. I wanted to do another timeline that follows the Concrete story, but that's rather difficult.
| July 1986 |
Dark Horse Presents #1 |
| September 1986 |
Dark Horse Presents #2 |
| November 1986 |
Dark Horse Presents #3 |
| January 1987 |
Dark Horse Presents #4 |
| February 1987 |
Dark Horse Presents #5 |
| March 1987 |
Concrete #1 |
| April 1987 |
Dark Horse Presents #6 |
| May 1987 |
Concrete #2 |
| July 1987 |
Dark Horse Presents #8 |
| August 1987 |
Concrete #3 |
| September 1987 |
Dark Horse Presents #10 |
| October 1987 |
Concrete #4 |
| November 1987 |
Dark Horse Presents #12 |
| December 1987 |
Concrete #5 |
| January 1988 |
Dark Horse Presents #14 |
| February 1988 |
Concrete #6 |
| March 1988 |
Dark Horse Presents #16 |
| April 1988 |
Concrete #7 |
| May 1988 |
Dark Horse Presents #18 |
| June 1988 |
Concrete #8 |
| July 1988 |
Dark Horse Presents #20 |
| September 1988 |
Concrete #9 |
| September 1988 |
Dark Horse Presents #22 |
| November 1988 |
Concrete #10 |
| February 1989 |
Concrete: Land & Sea |
| February 1989 |
Concrete Color Special |
| March 1989 |
Dark Horse Presents #28 |
| August 1989 |
Dark Horse Presents #32 |
| October 1989 |
Concrete: A New Life |
| April 1990 |
Dark Horse Presents #38 |
| April 1990 |
Concrete Celebrates Earth Day 1990 |
| July 1990 |
Concrete: Odd Jobs |
| April 1991 |
Dark Horse Presents 5th Anniversary Special |
| April 1991 |
Concrete: Fragile Creature #1 |
| May 1991 |
Concrete: Fragile Creature #2 |
| June 1991 |
Concrete: Fragile Creature #3 |
| July 1991 |
Concrete: Fragile Creature #4 |
| September 1992 |
Dark Horse Presents #66 |
| April 1993 |
Concrete: Eclectica #1 |
| May 1993 |
Concrete: Eclectica #2 |
| August 1993 |
San Diego ComicCon Comics #2 |
| July 1994 |
Concrete: Killer Smile #1 |
| August 1994 |
Concrete: Killer Smile #2 |
| September 1994 |
Concrete: Killer Smile #3 |
| September 1994 |
Dark Horse Presents #87 |
| October 1994 |
Concrete: Killer Smile #4 |
| April 1995 |
Concrete Hero Special |
| August 1995 |
Dark Horse Presents #100-3 |
| March 1996 |
Concrete: Think Like A Mountain #1 |
| April 1996 |
Concrete: Think Like A Mountain #2 |
| May 1996 |
Concrete: Think Like A Mountain #3 |
| June 1996 |
Concrete: Think Like A Mountain #4 |
| July 1996 |
Concrete: Think Like A Mountain #5 |
| August 1996 |
Concrete: Think Like A Mountain #6 |
| October 1996 |
Dark Horse Decade #4 |
| December 1997 |
Concrete: Strange Armor #1 |
| January 1998 |
Concrete: Strange Armor #2 |
| February 1998 |
Concrete: Strange Armor #3 |
| March 1998 |
Concrete: Strange Armor #4 |
| May 1998 |
Concrete: Strange Armor #5 |
| June 1998 |
Dark Horse Extra #1 |
| July 1998 |
Dark Horse Extra #2 |
| August 1998 |
Dark Horse Extra #3 |
| September 1998 |
Dark Horse Extra #4 |
| August 1999 |
Dark Horse Presents Annual 1999 |
| January 2000 |
Dark Horse Presents #150 |
| July 2000 |
Dark Horse Maverick 2000 |
| December 2004 |
Concrete: The Human Dilemma #1 |
| January 2005 |
Concrete: The Human Dilemma #2 |
| February 2005 |
Concrete: The Human Dilemma #3 |
| March 2005 |
Concrete: The Human Dilemma #4 |
| April 2005 |
Concrete: The Human Dilemma #5 |
| May 2005 |
Concrete: The Human Dilemma #6 |
| April 2011 |
Dark Horse Presents II #1 |
| June 2011 |
Dark Horse Presents II #2 |
| August 2011 |
Dark Horse Presents II #3 |
| July 2012 |
Concrete: Three Uneasy Pieces |