5.3 Using the monitor
Visitors may gain an insight into the workings and material of the course. Visitors may experience for themselves how a few simple measurements can identify energy savings in their homes. Registered students can prepare on OpenLearn before the course website opens, in particular by starting their systematic monitoring of home energy usage.
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5.2 Getting started
Visitors may gain an insight into the workings and material of the course. Visitors may experience for themselves how a few simple measurements can identify energy savings in their homes. Registered students can prepare on OpenLearn before the course website opens, in particular by starting their systematic monitoring of home energy usage.
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5.1 Introduction to the plug monitor
Visitors may gain an insight into the workings and material of the course. Visitors may experience for themselves how a few simple measurements can identify energy savings in their homes. Registered students can prepare on OpenLearn before the course website opens, in particular by starting their systematic monitoring of home energy usage.
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4.1 Introduction to energy monitors
Visitors may gain an insight into the workings and material of the course. Visitors may experience for themselves how a few simple measurements can identify energy savings in their homes. Registered students can prepare on OpenLearn before the course website opens, in particular by starting their systematic monitoring of home energy usage.
Author(s): The Open University

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3.4 Energy bills
Visitors may gain an insight into the workings and material of the course. Visitors may experience for themselves how a few simple measurements can identify energy savings in their homes. Registered students can prepare on OpenLearn before the course website opens, in particular by starting their systematic monitoring of home energy usage.
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3.3 Unmetered fuels
Visitors may gain an insight into the workings and material of the course. Visitors may experience for themselves how a few simple measurements can identify energy savings in their homes. Registered students can prepare on OpenLearn before the course website opens, in particular by starting their systematic monitoring of home energy usage.
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3.2 Vampires database
Visitors may gain an insight into the workings and material of the course. Visitors may experience for themselves how a few simple measurements can identify energy savings in their homes. Registered students can prepare on OpenLearn before the course website opens, in particular by starting their systematic monitoring of home energy usage.
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3.1 The workbook
Visitors may gain an insight into the workings and material of the course. Visitors may experience for themselves how a few simple measurements can identify energy savings in their homes. Registered students can prepare on OpenLearn before the course website opens, in particular by starting their systematic monitoring of home energy usage.
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3 Record your readings
Visitors may gain an insight into the workings and material of the course. Visitors may experience for themselves how a few simple measurements can identify energy savings in their homes. Registered students can prepare on OpenLearn before the course website opens, in particular by starting their systematic monitoring of home energy usage.
Author(s): The Open University

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2.3 How to read your meter
Visitors may gain an insight into the workings and material of the course. Visitors may experience for themselves how a few simple measurements can identify energy savings in their homes. Registered students can prepare on OpenLearn before the course website opens, in particular by starting their systematic monitoring of home energy usage.
Author(s): The Open University

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2.2 Meters
Visitors may gain an insight into the workings and material of the course. Visitors may experience for themselves how a few simple measurements can identify energy savings in their homes. Registered students can prepare on OpenLearn before the course website opens, in particular by starting their systematic monitoring of home energy usage.
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2.1 Introduction to measuring energy usage
Visitors may gain an insight into the workings and material of the course. Visitors may experience for themselves how a few simple measurements can identify energy savings in their homes. Registered students can prepare on OpenLearn before the course website opens, in particular by starting their systematic monitoring of home energy usage.
Author(s): The Open University

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1 Before the course starts
Visitors may gain an insight into the workings and material of the course. Visitors may experience for themselves how a few simple measurements can identify energy savings in their homes. Registered students can prepare on OpenLearn before the course website opens, in particular by starting their systematic monitoring of home energy usage.
Author(s): The Open University

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Next steps

After completing this unit you may wish to study another OpenLearn Study Unit or find out more about this topic. Here are some suggestions:

If you wish t
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6.3 Tacoma Narrows suspension bridge failure

Such over-design could not be sustained for long and bridge designers gradually pared back their margins of safety. There is elegance and economy in having the lightest structure compatible with function. But history has a habit of repeating itself.

In 1940 a new suspension bridge with a central span of 2800 feet was built over the Tacoma Narrows in the United States. It was soon noticed the bridge deck was prone to oscillate in certain winds. The vertical amplitude of the oscillations
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6.2 Forth Bridge

When the Forth was eventually bridged in 1890 it marked a new dimension in bridge construction. The main crossing is 5330 feet long and has a headroom above high water of fully 157 feet. It consists of three huge double cantilevers fabricated from steel with a maximum height above high water of 361 feet. The bridge contains 58 000 tons of steel, of which 4200 tons are just rivets. The steelwork has an external area of 145 acres and it is a full-time job for a gang of 29 painters to protect th
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6.1 New Tay Bridge

So the collapse of the bridge was probably caused by premature fracture of the lugs, perhaps aided by fatigue (Input 10). Once the wind braces had been lost, the stability of the piers was drastically reduced because each trio of columns became separated (Figure 47). It only needed a further small sway to cause toppling, because of the shift in centre of gravity of the piers.

The collapse of the Tay Bridge sent shock
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Myths persist

Many myths still surround the Tay Bridge disaster, the most pervasive being it was brought down by wind action alone. Rothery's report (see Paper 3) should dispel that particular myth, in addition to the numerous examples shown in this unit of the way the structure had deteriorated by the time of the storm in late 1879.

Click 'View document' below to open Paper 3 (35 pages, 39 MB).

Another m
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5.15 Further investigation is possible

There are still many mysteries that surround the Tay Bridge disaster, largely because so little was recorded at the time of construction. For instance, questions remain about the details of reject rates for the castings, and modifications made to the first designs of the piers and their component parts.

Although enlargement of the BoT set of pictures has helped clarify the various failure modes described by Henry Law and others at the enquiry, it has also revealed yet more mysteries. Wh
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5.14 Questions remain and myths persist

So ended the enquiry, with reports that condemned the design and construction of the bridge. However, the speed of the enquiry – only 6 months – left many gaps in the evidence. They included:

  • a detailed survey of the damage to the cast-iron piers that fell into the river, pinpointing the exact position of casting and other defects;

  • exploration of the way the original design was made, and the modifications to the design after construc
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