The STRUCTURES range enables clear and comprehensive learning of structural STATICS covering a variety of theories and topics within Architectural, Mechanical, Civil and Structural Engineering.
These include FORCE, BENDING, SHEAR, ELASTICITY, BEAMS, ARCHED BRIDGES, SUSPENSION BRIDGES, TRUSSES, FRAMEWORKS and PORTALS. The STRUCTURES hardware can be connected to the Hi-Tech Education HDA200 Interface creating a stand alone solution within the laboratory. Alternatively the STRUCTURES hardware can be fully Data Acquisitioned in conjunction with the experiment software. With the software the students can benefit from a wider learning experience.

## HST22 Torsion of Rods and Tubes

Students verify the torsion equation with this apparatus by applying known torque to specimens of varying diameters, and materials. The theory also extends to non-circular specimens.

## HST23 Equilibrium of Forces

A purely analogue experiment for the study of the equilibrium of forces acting in a single vertical plane. Students can study concurrent and non-concurrent forces in the vertical plane and also construct a polygon of forces.

## HST31 Suspension Cable

The purpose of the experiment is to compare the simplified theory of a suspension cable with the results measured using a chain of uniform weight per unit length.

The main variables are the shape of the hanging cable, particularly the maximum sag, and the weight per unit length.  Measurements are to be made of the tension at each end of the cable and the curvature of the chain.  The effect of a point load is also studied.

## HST35 Strain Measurement for Structures

Two beam supports with either knife edges or clamp plate are set up on a base in order to carry five different strain gauged test specimens.

The first is a calibration beam intended to be put into circular bending by four point loading. Three cantilevers show the effect of different materials and a varying width. The fifth specimen is a hollow square section cantilever with an offset end load and strain gauges for bending and torsion.

The strain gauge outputs are fed into the HDA200 Interface (not supplied) for viewing, capturing, reviewing and manipulation.

## HST38 Deflections of Trusses

A set of eighteen truss members with lengths based on the 3:4:5 triangle enables at least three different three bay cantilever trusses to be built by creating true pin joints. Two 3:4:5 triangles and a 20.5° top member inclination truss can be created.

Two springings are supplied at one end of the truss and the fix to one of the vertical sides of the HST1 Universal Frame and Stand (sold separately). The truss joint deflections are measured using a movable dial gauge mounted on a sub-frame attached to each springing. Having common mounts for the truss and dial gauge sub-frame ensures the deflections are truly relative to the truss springings.

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