Museum Roof Construction Has Ups and Downs, Ins and Outs
In a project chock-full of tricky terrain, the contoured roof profile still stands out as the most convoluted, with the warped skylight over the piazza a close second. Crews erected roof steel in over 20 sequences, in careful coordination with concrete walls and curtain-wall operations, says Matt Rossie, a project director for Webcor Builders, the San Mateo, Calif.-based general contractor for the California Academy of Sciences.
For example, wall gang forms needed to be flown out after casting, which meant that only the primary roof steel could be installed prior to the third-floor pours.