Allana Buick & Bers, a forensic engineer hired by the Millennium Tower Association, says the cracked window glass in Unit 36B of the San Francisco residential building was caused by an exterior impact.

A joint venture of Portugal’s Mota-Engil and South Africa-based engineering company Concor Holdings Ltd. has won a $118-million contract for the construction of South Africa’s longest-span cable-stayed suspension bridge.

Crews failed to relocate pressure-sensing lines from an old cast-iron distribution main during a mid-September Columbia Gas pipeline replacement, igniting a series of explosions and fires north of Boston, according to a preliminary report by federal investigators.

Seattle’s Sound Transit is investigating the cause of cracks in the rails of its signature Link light-rail system.

Bank's preliminary estimate pegs housing, buildings, infrastructure damage at $531 million.