Commercial building in the context of "Structure fire"

A sanitary sewer is an underground pipe or tunnel system for transporting sewage from houses and commercial buildings (but not stormwater) to a sewage treatment plant or disposal.

Sanitary sewers are a type of gravity sewer and are part of an overall system called a "sewage system" or sewerage. Sanitary sewers serving industrial areas may also carry industrial wastewater. In municipalities served by sanitary sewers, separate storm drains may convey surface runoff directly to surface waters. An advantage of sanitary sewer systems is that they avoid combined sewer overflows. Sanitary sewers are typically much smaller in diameter than combined sewers which also transport urban runoff. Backups of raw sewage can occur if excessive stormwater inflow or groundwater infiltration occurs due to leaking joints, defective pipes etc. in aging infrastructure.

Alexander Nikanorovich Pomerantsev (Russian: Александр Никанорович Померанцев; 11 November 1849 — 27 October 1918) was a Russian architect and educator responsible for some of the most ambitious architectural projects realized in Imperial Russia and Bulgaria at the turn of the 20th century. An accomplished eclecticist, Pomerantsev practiced Art Nouveau, Byzantine, Russian Revival styles and collaborated with leading structural engineers of his period in creating new types of commercial buildings.

The 2010 Haiti earthquake was a catastrophic magnitude 7.0 M_w earthquake that struck Haiti at 16:53 local time (21:53 UTC) on Tuesday, 12 January 2010. The epicenter was near the town of Léogâne, Ouest department, approximately 25 kilometres (16 mi) west of Port-au-Prince, Haiti's capital.

By 24 January, at least 52 aftershocks measuring 4.5 or greater had been recorded. An estimated three million people were affected by the quake. Death toll estimates range from 100,000 to about 160,000; the Haitian government estimated the death toll to range from 220,000 to 316,000, although these figures are a matter of some dispute. The earthquake is the deadliest natural disaster of the 21st century for a single country. The government of Haiti estimated that 250,000 residences and 30,000 commercial buildings had collapsed or were severely damaged. Haiti's history of national debt, prejudicial trade policies by other countries, and foreign intervention into national affairs contributed to the existing poverty and poor housing conditions that increased the death toll from the disaster.