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| MACHINED END |
| End of section that has been prepared to transmit its load by bearing. (BS5950:Part 2). |
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| MAGNETIC PARTICLE WELD TESTING |
| A process for detecting surface cracks in welds using magnetic particles suspended in a fluid. A magnetising current is passed through the steel and the particles line up at any cracks. |
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| MANSARD ROOF |
| A flat roof having sloping edges to eaves level. |
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| MANUAL METAL ARC WELDING (MMA) |
| Welding using a hand held stick electrode. |
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| MASONRY |
| Blocks of stone or bricks forming load bearing walls or cladding features to a building. |
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| MASS PRODUCTION |
| Assembly line fabrication of frame or sub-frame component to form a perpendicular type of building frame. |
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| MATERIAL FACTOR |
| A factor to take account of the variability of materials strength from limit state design. Material factor times yield strength gives design strength (See BS5950: Part1) |
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| MEMBER |
| Any individual component of a structural frame. |
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| MODULUS (ELASTIC) |
| The Elastic Modulus is a geometric property and is given by the first moment of area of a section about the elastic neutral axis. |
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| MODULUS (PLASTIC) |
| The Plastic Modulus is obtained as the first moment of area of a section about the plastic neutral axis (equal area axis). |
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| MOMENT (BENDING) |
| See Bending Moment |
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| MOMENT OF A FORCE |
| The force times the distance. |
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| MOMENT OF RESISTANCE |
| The capacity of a section to resist applied bending moment. |
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| MOMENT OF INERTIA |
| The second moment of area of a section about the elastic neutral axis. |
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| MONORAIL |
| A track hung from the underside of a roof, usually an I section along which a lifting appliance travels (Run way beam). |
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| MULTI-STOREY |
| A building having more than one storey. |