The way viruses spread from human to human is being reevaluated by scientists and that may have an impact on future ventilation standards.
At the outset of the Covid-19 outbreak, the prevailing belief was that the virus was spread via droplets that quickly dropped out of the air. As researchers studied the virus, however, they realized that it was likely spread via aerosols—smaller, lighter particles that travel further than six feet and can linger in the air in poorly ventilated spaces.
Colds and flu have been thought to be primarily spread via droplets, as well, as they hold more viruses than aerosols. But studies have found that a smaller amount of influenza virus is needed to infect people when inhaled as aerosols rather than sprayed up the nose as saliva droplets.
If this view is correct, improved ventilation could greatly reduce transmission of colds and flu viruses as well as Covid. For this reason, some believe new minimum ventilation standards in buildings should be enacted especially when one considers some 12,000 to 61,000 people annually succumb to the flu.
Related Stories
Contractors | Apr 26, 2024
AGC releases decarbonization playbook to help assess, track, reduce GHG emissions
The Associated General Contractors of America released a new, first-of-its-kind, decarbonization playbook designed to help firms assess, track, and reduce greenhouse gas emissions on projects. The AGC Playbook on Decarbonization and Carbon Reporting in the Construction Industry is part of the association’s efforts to make sure construction firms play a leading role in crafting carbon-reduction measures for the industry.
Resiliency | Apr 22, 2024
Controversy erupts in Florida over how homes are being rebuilt after Hurricane Ian
The Federal Emergency Management Agency recently sent a letter to officials in Lee County, Florida alleging that hundreds of homes were rebuilt in violation of the agency’s rules following Hurricane Ian. The letter provoked a sharp backlash as homeowners struggle to rebuild following the devastating 2022 storm that destroyed a large swath of the county.
Mass Timber | Apr 22, 2024
British Columbia changing building code to allow mass timber structures of up to 18 stories
The Canadian Province of British Columbia is updating its building code to expand the use of mass timber in building construction. The code will allow for encapsulated mass-timber construction (EMTC) buildings as tall as 18 stories for residential and office buildings, an increase from the previous 12-story limit.
Standards | Apr 22, 2024
Design guide offers details on rain loads and ponding on roofs
The American Institute of Steel Construction and the Steel Joist Institute recently released a comprehensive roof design guide addressing rain loads and ponding. Design Guide 40, Rain Loads and Ponding provides guidance for designing roof systems to avoid or resist water accumulation and any resulting instability.
Building Materials | Apr 22, 2024
Tacoma, Wash., investigating policy to reuse and recycle building materials
Tacoma, Wash., recently initiated a study to find ways to increase building material reuse through deconstruction and salvage. The city council unanimously voted to direct the city manager to investigate deconstruction options and estimate costs.
Construction Costs | Apr 16, 2024
How the new prevailing wage calculation will impact construction labor costs
Looking ahead to 2024 and beyond, two pivotal changes in federal construction labor dynamics are likely to exacerbate increasing construction labor costs, according to Gordian's Samuel Giffin.
Codes and Standards | Apr 12, 2024
ICC eliminates building electrification provisions from 2024 update
The International Code Council stripped out provisions from the 2024 update to the International Energy Conservation Code (IECC) that would have included beefed up circuitry for hooking up electric appliances and car chargers.
Urban Planning | Apr 12, 2024
Popular Denver e-bike voucher program aids carbon reduction goals
Denver’s e-bike voucher program that helps citizens pay for e-bikes, a component of the city’s carbon reduction plan, has proven extremely popular with residents. Earlier this year, Denver’s effort to get residents to swap some motor vehicle trips for bike trips ran out of vouchers in less than 10 minutes after the program opened to online applications.
Laboratories | Apr 12, 2024
Life science construction completions will peak this year, then drop off substantially
There will be a record amount of construction completions in the U.S. life science market in 2024, followed by a dramatic drop in 2025, according to CBRE. In 2024, 21.3 million sf of life science space will be completed in the 13 largest U.S. markets. That’s up from 13.9 million sf last year and 5.6 million sf in 2022.
MFPRO+ News | Apr 12, 2024
Legal cannabis has cities grappling with odor complaints
Relaxed pot laws have led to a backlash of complaints linked to the odor emitted from smoking and vaping. To date, 24 states have legalized or decriminalized marijuana and several others have made it available for medicinal use.
