338 



SELLING LUMBER 



The New 

 Rule Received 

 with 

 Enthusiasm 



The Rule 



Eliminates 



Guesswork 



Mill- 

 Constructed 

 Buildings 

 Are 

 Flexible 



Mixed Timber 

 Quality Hurts 

 Prices 



Architects, by the New Orleans Dock Board, by the U. S. Navy 

 Department and various building code commissions. 



The new rule has been brought to the attention of architects 

 and engineers throughout the country through the advertising of 

 the Southern Pine Association, and it has been enthusiastically re- 

 ceived by the professional builders everywhere, as providing the 

 first accurate and practical method ever devised for determining, 

 with ease and certainty, the actual dependability of Southern Yel- 

 low Pine Timber required to sustain definite loads. 



The Density Rule removes Southern Yellow Pine structural 

 timbers from the class of speculative material, and provides a 

 measure of strength value that eliminates guesswork. It is a 

 recognized fact that the type of building construction known as 

 "Standard Mill" possesses advantages not equaled by any other 

 type of construction when used for factory, warehouses and other 

 commercial purposes. These advantages are economy in cost of 

 construction, and a very high degree of fire resistance when built 

 and equipped with automatic sprinklers, as specified by the Asso- 

 ciated Factory Mutual Fire Insurance Companies. 



One of the greatest advantages of this type of construction 

 is that such buildings are flexible; they can be easily altered for 

 different kinds of occupancy. This fact was clearly demonstrated 

 in the demolishing and rebuilding of the Albert Dickinson Com- 

 pany's warehouses in Chicago. Every piece of Southern Yellow 

 Pine was re-used in the new building after having been in use in 

 the old building for more than twenty years. 



The Density Rule is a guarantee to the architects and en 

 gineers that their specifications will be carried out; the more 

 definite it is possible to make grading rules or the closer it is 

 possible to classify structural material from the standpoint of 

 strength, the more satisfactorily it can be used by the engineer 

 and the more likely will be the producer to obtain a reasonable 

 price for his product. 



The mixing of timbers, varying in strength, of course, makes 

 it necessary for the engineer .to design on the basis of the weakest 

 material he is liable to find in the lot, and on that basis he is only 

 willing to pay the price of the weakest material. 



The uncertainty attending the use of timbers in the past 

 has often established a prejudice against their use, and in instances 

 where, had the element of uncertainty of quality been removed. 



