CHAPTER XIII. 

 ESTIMATES OF STRUCTURAL STEEL. 



GENERAL INSTRUCTIONS. When an estimate of the structural steel in a structure 

 is to be made the man in charge shall immediately examine all of the data furnished to see that 

 he has sufficient information to make a satisfactory estimate. He shall fill out the data sheet 

 completely, and then take off the quantities. Use only the standard estimate blanks for taking 

 off material. The author has found the estimate blank below very satisfactory. 



CROCKER C& KETCHUM 



Consulting Engineers 



' 



Feb.E5.19lg 



' Number each page consecutively, and when all the quantities are totaled prepare a summary 

 on the last page. Each sheet shall have the sheet number and also the total number of sheets 

 in the estimate, for example 9 of 20. This will prevent the loss of a page. After the estimate is 

 completely taken off another man shall check it. When checked the estimate shall be extended 

 by the checker, each sheet being immediately totaled up as extended. The extensions shall then 

 be checked by the original estimator, who also prepares a summary. The summary is then 

 checked by the checker and the estimate is complete. 



The estimate should be practically a condensed bill of material of the work, and should be 

 so clearly made that a reference to the estimate will show at a glance the weight of all the principal 

 pieces. Main and secondary trusses, main columns, girders, crane gilders, etc., for buildings; 

 and trusses, girders, floorbeams, etc., for bridges should be taken off separately, thus I truss, 

 6 required and shall not be mixed together even though the correct weight is obtained. In 

 making an estimate the following order will be found convenient. 



i. MILL BUILDINGS. Trusses. Top chords, lower chords, web members, purlin lugs, 

 gusset plates, connection plates, splice plates, eave strut connections, knee, braces and knee 

 brace connections. 



Ventilator Trusses. Rafters, posts, web members, gusset plates, connections to trusses and 

 purlin lugs. 



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