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# Cyclopedia of Architecture, Carpentry and Building : A General Reference Work (1912)

Table 12
Table 12. Specific Gravity, Weight, Resistance To Crushing, And Absorption Power Of Stones. Cobblestone Pavement. Cobblestones Bedded In Sand Possess The Merit Of Cheapness, And Afford An Excellent Foothold For Horses; But The Roughness Of Such Pavements Requires The Expenditure Of A Large Amount Of Tractive Energy To Move A ...

Table Vi
Table Vi Determination Of Position Of Wheel Loads For Maximum Moments One Should Carefully Note That In Certain Positions, As When Wheels 11, 12, 13, And 14 Are At Some Wheels Are To The Left Of The Left Support; That Is, They Are Not Upon The Bridge. In All Such ...

Tools For Grading. Picks Are Made Of Various Styles, According To The Class Of Material In Which They Are To Be Used. Fig. 28 Shows The Form Usually Employed In Street Work. Fig. 29 Shows The Form Generally Used For Clay Or Gravel Excavation. The Eye Of The Pick Is ...

Trusses Under Dead And
Trusses Under Dead And Live Loads 39. The Pratt Truss. The Pratt Truss Is Used To Perhaps A Greater Extent Than Any Other Form; Probably 90 Per Cent Of All Simple Truss Spans Are Of This Kind. Let It Be Desired To Determine The Stresses In The 8-panel 200-foot Single-track ...

U 20 X U
+20 X U,u, + 40 X 15 833  20 X 6 333 = 0; Whence = 25 333; +20 X U,u, + 60 X 15 833  40 X 6 333  20 X 6 333 = 0; Whence = 28 500. A Diagram Of Half Of The Truss ...

U L
L, U, = 0 U,l, I See Discussion U L, = 0 Following. If Live Panel Loads Were Placed At Points L And L, The Live Load Shear In C  C Would Be 46.8; And The Dead-load Shear Being + 15, The Counter Would Act, And The Stress In ...

U U
+u,u, + U,u,  Hor. Comp. M,u, + Hor. Comp. = 0 +252.0+ .. U,u. = 300.0. In A Similar Manner, By Resolving The Horizontal Forces At It Will Be Seen That The Action Of Will Neutralize That Of As They Are Equal And Pull In Opposite Directions, And Is ...

Weights Of Bridges 20
Weights Of Bridges 20. Formulζ. In Order To Obtain The Stresses Due To The Weight Of The Structure, The Latter Quantity Must Be Known. As This Weight Can Be Determined Only After The Structure Has Been Designed, It Is Evident That An Assumption As To The Weight Must Be Made. ...

Width And Transverse Contour
Width And Transverse Contour. A Road Should Be Wide Enough To Accommodate The Traffic For Which It Is Intended, And Should Comprise A Wheelway For Vehicles And A Space On Each Side For Pedestrians. The Wheelway Of Country Highways Need Be No Wider Than Is Absolutely Necessary To Accommodate The ...

Wind Load Effects 50
Wind-load Effects 50. Top Lateral System Through=bridges. The Unit-loads For This System Are Given In Article 26. Common Practice Is To Take 150 Pounds Per Linear Foot Of Top Chord, The End-post Being Con Sidered Part Of The Top Chord In This Computation. In Many Of The Longer-span Modern Bridges, ...

Wood Pavements
Wood Pavements Wood Pavements Are Formed Of Either Rectangular Or Cylindrical Blocks Of Wood. The Rectangular Blocks Are Generally 3 Inches Wide, 9 Inches Long, And 6 Inches Deep; The Round Blocks Are Commonly 6 Inches In Diameter And 6 Inches Long. The-kinds Of Wood Most Commonly Used Are Cedar, ...

X 7 4040
X 7 = 40 + 40 X 2 + 40 X 3 + 40 X 4 + 40 X 5 + 40 X 6, And Can Still Be Simplified By Writing: Which Is The Form Customarily Used, The Panel Length Being Taken As A Unit Of Measurement. The Other Shears ...