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SURVEYING FOR BUILDING CONSTRUCTION
Surveying with Tape and PlumbBob 724
Surveying with Transit and Level 2556
6 other sections not shown
adjusted alinement anchor angle attached axis batter boards beams bolts boom builders building clamp columns connections contour contractor corners cost crane crawler described in Art distance drift pin driven dumpy level Empire State Building engineers equipment erection of steel erection plans erector excavation fastened floor foot gin pole girders ground guy derrick guy lines hauling head chainman height of instrument hemp hoisting hoisting device holes hook block horizontal inch joists leveling rod leveling screws lifted limb line of sight live line load located lower main scale measurement method necessary operation paint perpendicular plate plumb-bob plumbed position pull purlins raised range poles sheave shown in Fig sling snatch block spirit level stake steel erector steel frame steelwork stiff-leg derrick structural steel surveying tackle tape length telescope timber tion tonnage transit trusses unloading upper usually vertical welded wire rope zero mark