William A. Radford · Radford Architectural Company · leaf 34
ed with and TENSILE STRENGTH-POUNDS PER SQUARE J™ n^ reived the attention they shonld inch. ±r(>m makers of blocks. Hair cracks, be- Water—Pet. ...8% 12% 14% 16% 18% 20% ing on the surface, are no indication of a 7Tda^°f TZ26I 433 392 368 338 301 weakness of the block- It has been known 28 days… … Fig. to—Here are shown the essential details of wood work around the window frames in connection with con-crete blocks. Immersing Concrete Blocks. Cement,while setting, is injured by sudden changes,in dampness, temperature or air drafts.Therefore, to dip a newly made block intowater is injurious.…
