Karst Sinkhole Monitoring: Why a Settlement Limit Is an Angle With the Length Left Out

Karst Sinkhole Monitoring: Why a Settlement Limit Is an Angle With the Length Left Out

Summary: A settlement limit is an angle with the length left out. The karst monitoring criteria are settlement amounts, settlement rates and crack ...

Read More »
Stockyard Rail Settlement Monitoring for Stackers and Reclaimers: The Stored Product Is the Load

Stockyard Rail Settlement Monitoring for Stackers and Reclaimers: The Stored Product Is the Load

Summary: A stockyard is the one site where the largest, the fastest changing and the most asymmetric load on the foundation of a machine is the mat...

Read More »
Railway Track Twist Monitoring: Why the Limit Changes With the Measuring Base

Railway Track Twist Monitoring: Why the Limit Changes With the Measuring Base

Summary: Track twist is the algebraic difference in cross level between two points a stated distance apart, and every standard that regulates it pu...

Read More »
Belt Conveyor Alignment and Tracking Monitoring: The Two Angles That Move a Belt, and the One an Instrument Reads

Belt Conveyor Alignment and Tracking Monitoring: The Two Angles That Move a Belt, and the One an Instrument Reads

Summary: A belt answers to two different angular errors, and the published tolerance tables do not tell you which one you are reading. A skewed idl...

Read More »
Pile Verticality Monitoring: Why 1 in 100 Is a Taper and Not an Angle

Pile Verticality Monitoring: Why 1 in 100 Is a Taper and Not an Angle

Summary: Every document that governs a pile writes its verticality tolerance the same way, as a ratio of the deviation to the pile’s own leng...

Read More »
Crane Runway Alignment Monitoring: Tolerances, Skewing Force and What a Tilt Channel Reads

Crane Runway Alignment Monitoring: Tolerances, Skewing Force and What a Tilt Channel Reads

Summary: On an overhead crane runway the load argument for monitoring is weaker than it looks, and the instrument argument is different from the on...

Read More »
Roof Ponding Monitoring: Why the Slope That Drains Is Not the Slope on the Drawing

Roof Ponding Monitoring: Why the Slope That Drains Is Not the Slope on the Drawing

Summary: The building code gates a structural analysis with an angle. A bay whose roof slope is less than one quarter of an inch per foot has to be...

Read More »
Sea Dyke Monitoring: Why the Crest Fails Before the Slope Does

Sea Dyke Monitoring: Why the Crest Fails Before the Slope Does

Summary: A sea dyke is the one civil structure whose entire function is an absolute elevation. It does not hold anything up, it does not carry a lo...

Read More »
Canal Lining Panel Monitoring: Why the Joint Fails Before the Panel Does

Canal Lining Panel Monitoring: Why the Joint Fails Before the Panel Does

Summary: An unreinforced concrete canal lining carries almost no load, which is why it does not fail the way a wall fails. It is a set of panels, a...

Read More »
Penstock Monitoring: Why One Atmosphere Can Break a Steel Wall Built for Fifty

Penstock Monitoring: Why One Atmosphere Can Break a Steel Wall Built for Fifty

Summary: Every number on a penstock drawing is a pressure, and every one of them points the same way. The wall is sized by hoop stress, tested at a...

Read More »
Top