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Continuously wound ties (CWTs) are being used in place of conventional transverse reinforcement in concrete compression members to reduce waste and speed the construction process. To compare performance of CWTs with conventional ties, large-scale special boundary element specimens were designed, constructed, and tested under monotonically increasing axial compression.
Available in the following language(s): Spanish
Various codes, specifications, and reports provide different requirements/recommendations for anchor bolt (rod) installation in foundations. The article discusses the issues related to these requirements/recommendations and encourages designers to add 2 in. (50 mm) to the calculated design embedment length and to specify the elevation of the top of the anchor bolt.
Available in the following language(s): Spanish
The PS=Ø system allows engineers to design post-tensioned (PT) and reinforced concrete members with more restraint releases and without the construction schedule delays of traditional pour strips. With or without temporary PT stressing strips, PS=Ø couplers can be used as restraint relief details in slab-to-slab, slab-to-wall, and beam-to-beam joints.
Available in the following language(s): Spanish
Designed to look like a stacked flowerpot, the cast-in-place concrete IQON apartment building is the tallest building in Quito and the third tallest in Ecuador. Concrete construction made it possible to create a structure with greenery on its façade. Apartments feature terraces with planters containing one or more trees and plants like those found in adjacent La Carolina Park.
Available in the following language(s): Spanish
This month's Q&A focuses on requirements for checking flatness of suspended slabs. It discusses the time limit for measuring floor flatness after finishing, compliance requirements for the manual straightedge method, minimum number of samples, and sample distribution, as well as possible remedies for noncompliance.
Available in the following language(s): Spanish