Roles

The vapor resistances are:
4-in. tile 0.333
Insulation 0.008
4-in. brick 0.480

0.821



The vapor pressure differential is 50 per cent of saturated vapor pressure at 75 deg (0.4375 in. Hg) minus 90 per cent

Mason Contractor News
Published by The Mason Contractors Association of America, 208 S. La Salle St., Chicago 4, III.

Caracas Investigation
An extensive on-the-spot investigation of structural damage from the July 29 earthquake at Carac

Right-A 4 ft. by 8 ft. brick wall specimen being prepared for a transverse strength test. An air bag placed between the wall and a rigid backing board is inflated to subject the specimen to a uniform transverse load over 7 ft. 6 in. span.
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This detail of the load-bearing brick columns of the First National Bank, Loveland, Colo shows the interesting design created by the alternating column types. See next page for photograph of complete elevation.

BEARING WALL CONFERENCE

People & Events
President elect of the Dayton, Ohio, Chapter is Leonard Hoying. Other officers are: William Jones, Vice President; Percy Bilbrey, Secretary and Edgar Stamper, Jr., Treasurer.

The Eastern Seaboard Apprenticeship Conference w