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<font color="#003366"><font size="2" face="Arial, Helvetica, sans-serif">Clearance for Shipping</font> </font>
<font size="2" face="Arial, Helvetica, sans-serif">49 metres</font>


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<font color="#003366"><font size="2" face="Arial, Helvetica, sans-serif">Height of Pylons</font> </font>
<font size="2" face="Arial, Helvetica,sans-serif">89 metre above mean sea level</font>


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<font color="#003366"><font size="2" face="Arial, Helvetica, sans-serif">Base of each abutment tower</font> </font>
<font size="2" face="Arial, Helvetica, sans-serif">68 metres across and 48 metres long (two pylons rest on each abutment tower)</font>





<font color="#003366"><font size="2" face="Arial, Helvetica, sans-serif">Total length of bridge</font> </font>
<font size="2" face="Arial, Helvetica, sans-serif">1149 metres including approach spans</font>


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<font color="#003366"><font size="2" face="Arial, Helvetica, sans-serif">Bearing Pins</font> </font>
<font size="2" face="Arial, Helvetica, sans-serif">Each of the four pins measures 4.2 metres long and 368 millimetres in diameter</font>


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<font color="#003366"><font size="2" face="Arial, Helvetica, sans-serif">Thrust on bearings</font> </font>
<font size="2" face="Arial, Helvetica, sans-serif">Under maximum load approximately 20,000 tonnes on each bearing</font>


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<font color="#003366"><font size="2" face="Arial, Helvetica, sans-serif">Number of rivets</font> </font>
<font size="2" face="Arial, Helvetica, sans-serif">Approximately 6,000,000</font>


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<font color="#003366"><font size="2" face="Arial, Helvetica, sans-serif">Largest rivet</font> </font>
<font size="2" face="Arial, Helvetica, sans-serif">Weighed 3.5 kilograms and was 395 millimetres long</font>


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<font color="#003366"><font size="2" face="Arial, Helvetica, sans-serif">Longest Hanger</font> </font>
<font size="2" face="Arial, Helvetica, sans-serif">58.8 metres</font>


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<font color="#003366"><font size="2" face="Arial, Helvetica, sans-serif">Shortest Hanger</font> </font>
<font size="2" face="Arial, Helvetica, sans-serif">7.3 metres</font>


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<font color="#003366"><font size="2" face="Arial, Helvetica, sans-serif">Total weight of steelwork</font> </font>
<font size="2" face="Arial, Helvetica, sans-serif">52,800 tonnes including arch and mild steel approach spans</font>


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<font color="#003366"><font size="2" face="Arial, Helvetica, sans-serif">Weight of arch</font> </font>
<font size="2" face="Arial, Helvetica, sans-serif">39,000 tonnes</font>


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<font color="#003366"><font size="2" face="Arial, Helvetica, sans-serif">Rock excavated for foundations</font> </font>
<font size="2" face="Arial, Helvetica, sans-serif">122,000 cubic metres</font>


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<font color="#003366"><font size="2" face="Arial, Helvetica, sans-serif">Concrete used for bridge</font> </font>
<font size="2" face="Arial, Helvetica, sans-serif">95,000 cubic metres</font>


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<font color="#003366"><font size="2" face="Arial, Helvetica, sans-serif">Granite facing used on pylons & piers</font> </font>
<font size="2" face="Arial, Helvetica, sans-serif">17,000 cubic metres</font>


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<font color="#003366"><font size="2" face="Arial, Helvetica, sans-serif">Allowance for deck expansion</font> </font>
<font size="2" face="Arial, Helvetica, sans-serif">420 millimetres</font>


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<font color="#003366"><font size="2" face="Arial, Helvetica, sans-serif">Allowance for arch expansion</font> </font>
<font size="2" face="Arial, Helvetica, sans-serif">The arch may rise or fall 18 centimetres due to heating or cooling</font>


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<font color="#003366"><font size="2" face="Arial, Helvetica, sans-serif">Number of panels in arch</font> </font>
<font size="2" face="Arial, Helvetica, sans-serif">28, each 18.28 metres wide</font>


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<font color="#003366"><font size="2" face="Arial, Helvetica, sans-serif">Record tonnage erected</font> </font>
<font size="2" face="Arial, Helvetica, sans-serif">589 tonnes of steelwork was erected on the arch in one day on 26 November 1929</font>


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<font color="#003366"><font size="2" face="Arial, Helvetica, sans-serif">Paint required</font> </font>
<font size="2" face="Arial, Helvetica, sans-serif">272,000 litres of paint were required to give the Bridge its initial three coats.</font>


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14 years ago. Rating: 1
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