what is bearing pressure - quora

Foundations/Footings Information Sheet

2019-12-16Presumptive load-bearing values of foundation materials a Class of materials Load-bearing pressure (Pounds per square foot) Crystalline bedrock 12 000 Sedimentary and foliated rock 4 000 Sandy gravel and/or gravel (GW and GP) 3 000 Sand silty sand clayey sand silty gravel and clayey gravel (SW SP SM SC GM and GC) 2 000 Clay sandy clay

Bridge Bearings

However the span restriction for sliding bearing utilization can be disregarded when it is used in combination with other bearing types Rocker and Pin Bearings for Bridge Structures Rocker is an expansion bearing composed of curved surface at the bottom which accommodate translational movement and a pin at the top makes room for rotation

NPTEL :: Civil Engineering

2020-6-10Module-2 Theory of Earth Pressure and Bearing Capacity: Lecture 6 : Introduction [ Section 6 1 Different Theories of Earth Pressure ] Lecture 6: 222 kb: Module-2 Theory of Earth Pressure and Bearing Capacity: Lecture 7 : Earth Pressure Theories [ Section 7 1 Rankine and Coulomb Theory ] Lecture 7: 532 kb: Module-2 Theory of Earth Pressure and

Definition of Bearing Stress

Bearing Stress Average normal stress on the contact surfaces of mating surfaces Source: API RP 17G Recommended Practice for Completion/Workover Risers Second Edition July 2006 (Reaffirmed April 2011) Global Standards Bearing Stress A bearing stress is

Concrete bearing stress

2002-6-11(It will give you an underestimate of the true maximum pressure) You need to go to a foundation engineering text and see how to calculate the bearing pressure under a simple spread footing subject to a resultant load outside the middle third RE: Concrete bearing

Bridge Bearings

However the span restriction for sliding bearing utilization can be disregarded when it is used in combination with other bearing types Rocker and Pin Bearings for Bridge Structures Rocker is an expansion bearing composed of curved surface at the bottom which accommodate translational movement and a pin at the top makes room for rotation

Determining Allowable Design Values for Wood

2015-8-5• Bearing Area Factor C b •T emperature C t • Moisture Content C M • Load duration C D • Beam Stability Factor C L • Size Factor C F Below is a sample of how to adjust the reference bending value by the factors listed above to arrive at the allowable bending value that would be used to design wood in bending Note that not

Calculator for Designing Compression Springs

This calculator computes all parameters (spring rate maximum load maximum stress solid height coil pitch coil angle wire length resonant frequency shear modulus and spring mass) related to a compression spring from basic geometry and material data input In determining the total number of coils in the spring the calculator assumes that the ends of the spring are squared

Determining Allowable Design Values for Wood

2015-8-5• Bearing Area Factor C b •T emperature C t • Moisture Content C M • Load duration C D • Beam Stability Factor C L • Size Factor C F Below is a sample of how to adjust the reference bending value by the factors listed above to arrive at the allowable bending value that would be used to design wood in bending Note that not

TYPES OF FOUNDATIONS

2014-8-19Since the footing is concentrically loaded soil bearing pressure is considered uniformly distributed assuming the footing is rigid At the bottom of footing: Net allowable bearing pressure qnet = 5 –[110x4/1000] –[150x2/1000] – [120/1000]=4 14 ksf Required minimum area of footing = P/q net = 100/4 14 = 24 15 sqft

What is Bearing? What are Main Types of Bearings?

Friction bearing are also subdivided into following types (A )Solid bearings: It is a simplest hole made in cast iron to support the shaft and form running fit These are made up of cast iron or bronze in the form of bush and press-fitted in fabricated or cast iron housings

Mechanics eBook: Shear and Bearing Stress

Bearing Stress Bearing Stress Due to a Bolt Bearing Stress on Plate (Animation) Click to view movie (58 kb) The average bearing stress is the force pushing against a structure divided by the area Exact bearing stress is more complicated but for most applications the

NPTEL :: Civil Engineering

2020-6-10Module-2 Theory of Earth Pressure and Bearing Capacity: Lecture 6 : Introduction [ Section 6 1 Different Theories of Earth Pressure ] Lecture 6: 222 kb: Module-2 Theory of Earth Pressure and Bearing Capacity: Lecture 7 : Earth Pressure Theories [ Section 7 1 Rankine and Coulomb Theory ] Lecture 7: 532 kb: Module-2 Theory of Earth Pressure and

NPTEL :: Civil Engineering

2020-6-10Module-2 Theory of Earth Pressure and Bearing Capacity: Lecture 6 : Introduction [ Section 6 1 Different Theories of Earth Pressure ] Lecture 6: 222 kb: Module-2 Theory of Earth Pressure and Bearing Capacity: Lecture 7 : Earth Pressure Theories [ Section 7 1 Rankine and Coulomb Theory ] Lecture 7: 532 kb: Module-2 Theory of Earth Pressure and

Reciprocating Compressor basic parts

2017-2-20Bearing: The main and connecting rod bearings should be split-sleeve steel-backed babbitted insert type Antifriction bearing shall be used for compressor rating less than 150kW As per API 618 trapper roller bearings are used as the main bearing for compressor rating less than 150kW The cross head pin should have a replaceable bush bearing

Pressure measurement

2020-8-17Pressure measurement is the analysis of an applied force by a fluid (liquid or gas) on a surface Pressure is typically measured in units of force per unit of surface area Many techniques have been developed for the measurement of pressure and vacuum Instruments used to measure and display pressure in an integral unit are called pressure meters or pressure gauges or vacuum gauges

TYPES OF FOUNDATIONS

2014-8-19Since the footing is concentrically loaded soil bearing pressure is considered uniformly distributed assuming the footing is rigid At the bottom of footing: Net allowable bearing pressure qnet = 5 –[110x4/1000] –[150x2/1000] – [120/1000]=4 14 ksf Required minimum area of footing = P/q net = 100/4 14 = 24 15 sqft

Footings Example 1 Design of a square spread footing of

1971-2-13column by bearing on concrete and the reinforcement dowels The foundation is wider on all sides than the loaded area Therefore the nominal bearing strength B n is the smaller of the two equations 2 ' 1 1 nc (0 85 ) A B f A A ' B f A nc 2(0 85 ) 1 2 1 A A where A 1 is the bearing area of the column and A 2 is the area of the part of the

Vertical Turbine Pumps

Hardfacing the surface of bearing and/or shaft to protect against wear from abrasives in the bearing area Rifle drilling of bowl shafts available for bearing protection on abrasive services Discharge bowl included with enclosed lineshaft construction 4 Goulds Vertical

Different types of Footings in construction Where

2017-6-4So that pressure on the soil does not exceed its allowable bearing capacity and restricts the settlement of the structure within the permissible limits Foundation increases the stability of the structure The settlement of the structure should be as uniform as possible and it

Oil Pressure flow and lubrication

2013-10-11A loose rear cam bearing will further reduce oil flow going to the rocker shaft With really bad bearings the oil pressure will be quite low and the rocker shaft will get very little oil Incidentally increasing oil viscosity increases oil pressure at low speed but it also DECREASES flow through the bearings at ALL speeds

Rock Stresses

2020-7-2bore minus the fracture closure pressure is called the "net pressure P Net " This is the "net pressure" available to create fracture width and to drive frac-ture propagation The value of net pressure at the end of the treatment that is the final ISIP minus fracture closure pressure is given a special name P S net pressure at

Methods of Bearing Capacity Determination Terzaghi

Analytic method i e through bearing capacity equations like using Terzaghi equation Meyerhof equation Hansen equation etc Correlation with field test data e g Standard penetration test (SPT) Cone penetration test (CPT) etc On site determination of bearing capacity e g Plate load test Pile load test Presumptive bearing capacity (recommended bearing capacity

Compressor Efficiency

J B Schwarz D N Andrews in 11th International Conference on Turbochargers and Turbocharging 2014 3 1 Compressor-Turbine Power Balance Compressor efficiency can be calculated by determining the stage enthalpy change a function of the pressure and temperature rise across the stage To find the turbine efficiency a robust technique is to use the turbocharger power balance to obtain the