Approximate allowable max. tensile load in threaded fasteners loaded in tension and shear

This table shows the approximate allowable max. tensile load in threaded fasteners loaded in tension and shear. Notes: Above allowable tensile loads are based on Ft=26-1.8fv≤20, where Ft is the allowable tensile stress, fv is the actual shear stress. Fu, the ultimate strength of the fastener, is assumed to be 40 k.s.i. The fastener is …

What’s a wick drain, and how do they work?

The term wick drain is a misnomer because these clever devices do not actually wick away water. Wick drains, more accurately called prefabricated vertical drains (PVDs), consist of synthetic band-shaped material that is installed vertically into soft soils to accelerate preconstruction preloading programs. The drains are approximately 102mm wide by 6mm thick and are composed …

ETFE system case studies

By Edward M Peck, AIA, LEED AP Boca Raton Resort and Club Image credit: Edward M. Peck (author) Location: Boca Raton, Fla. Architect: Office of Thierry W. Despont Ltd. VF project director: Edward M. Peck Specialty design/fabricator: Vector Foiltec Engineer: KPFF Date completed: 2008 Total area of ETFE: 14,000 ft2 The design concept was to …

London 2012 Olympic Stadium sustainable wrap

The London 2012 Olympic Stadium’s sustainable wrap—a polyester fabric with a low-density polyethylene coating produced by Dow Chemical Co.—will be comprised of 336 individual panels, each approximately 25m high and 2.5m wide. Dow estimates that the LDPE-coated fabric requires fewer materials to manufacture than the heavier fabrics more traditionally used as building wraps, and has …

Hardware: Signs and banners

By Mason Riddle Project Specs / Etude in blue: How it was done The Ferrari Stamisol® FT 381 Ice Blue fabric mesh is probably the most distinguishing characteristic of Copenhagen’s DR Koncerthuset designed by Jean Nouvel. The translucent cobalt blue textile not only reveals the performance hall’s interior volumes and glass façade but also the …