The essential technical guide, Methods to Check Dimensional Tolerances on Hollow Structural Sections, from the Steel Tube Institute (STI), is approved as the standard guide for measuring tolerances according to the American Society for Testing and Materials (ASTM). This resource makes it easy for producers, service centers, and fabricators to measure tolerances of hollow structural sections (HSS) correctly.

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San Francisco’s new Fireboat Station No. 35 is a floating two-story, 16,000-square-foot building at Pier 22 ½ supported by a 173-foot-long by 96-foot-wide by 9-foot-deep steel float moored by four guide piles behind San Francisco’s historic Fire Station 35 building. The station includes a new steel pier and associated steel support piles adjacent to the Embarcadero and historic timber pier, a vehicular and pedestrian ramp between the steel pier and float that supports the building, and a gangway between the float and historic timber pier for the firefighters (Figures 1 and 2).

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Park Designed by Diller Scofidio + Renfro (design architect) and Arup (engineer of record), the Park Union Bridge opened to pedestrians in July 2021, connecting the U.S. Olympic and Paralympic Museum to America the Beautiful Park and Downtown Colorado Springs. The bridge is called the rip curl for its cresting design; the footbridge spans 250 feet over active rail lines (Figure 1).

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The Montezuma Valley Irrigation Company Flume No. 6, also referred to as the McElmo Creek Flume (the Flume), located near the City of Cortez in Montezuma County, Colorado, is the last remaining flume of a water delivery system designed to irrigate the flat, open Montezuma Valley. The Flume is historically significant as an irrigation system of early Euro-American settlement.

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STRUCTURE magazine