NASHVILLE, Tenn. (AP) _ The building material tended to crumble and sometimes got soggy, but an architect has succeeded in building a 7 1/2 -foot, 200-pound model of an office tower made of 10,000 Girl Scout cookies.

The Cumberland Valley Council of the Girl Scouts was looking for a fresh promotional idea to kick off the annual cookie sale this month and enlisted the aid of architect Seab Tuck, father of an 8-year-old Brownie scout.

Tuck got his firm, Tuck Hinton Everton Architects, to sponsor the model of the downtown L&C Tower, a 31-story landmark dedicated in 1957 as Nashville's first skyscraper.

''We couldn't figure out how to scale it and finally got it to one cookie equals 8 feet. That was the first problem,'' Tuck said Tuesday, when the shellacked model went on display in the lobby of its namesake office building.

''The second problem was how to stick them together. We used a floor mastic. We tried glue and dry wall mud and they had too much moisture and made the cookies soft and soggy. The floor mastic worked great.''

It took 10 people three days to build the model, Tuck said. The structure has a rigid frame and cardboard doors, but everything else is made of five varieties of Girl Scout cookies, he said.

''We used the butter cookies for the limestone and the thin mints and Tagalongs for the windows,'' Tuck said. ''The mints made good black marble.''

The model will be placed on permanent display at Girl Scout headquarters in Nashville after a round of promotional stops in the city.

''Moving it does the most damage. You tend to lose a cookie or two or smash one,'' Tuck said. ''We're afraid people are going to try and eat it.''