Heavy End Bay Sleeved Purlin System

Heavy End Bay Purlin System

The heavy end bay sleeved purlin system provides the most economic solution for buildings with 5 bays or more.

This system caters for spans of up to 15m depending on the load to be applied and where the cladding or liner tray offers adequate lateral support by virtue of its screw fixings at 600mm maximum spacings to the purlins. To enable purlin and sleeve to nest together the sleeve is inverted.

Computer controlled production techniques apply the client’s individual mark numbers to all purlins automatically during the manufacturing process.

  • Single Span System

    The arrangements (below) indicate how the end bay purlins (P1 and P1X) and penultimate rafter sleeves are of the same heavier gauge material, whereas the inner bay purlins (P2, P3, P5, P5X, P6 and P6X) and sleeves are of the same lighter gauge material.

    Note: a sleeve must always occur at a purlin joint position.

    Typical single span arrangement indicating purlin and sleeve positions.

    Heavy End Bay System - Typical Single Span Arrangement

    Note: consideration must be given to the handling of longer lengths

  • Double Span System

    The arrangements (below) indicate how the end bay purlins (P1 and P1X) and penultimate rafter sleeves are of the same heavier gauge material, whereas the inner bay purlins (P2, P3, P5, P5X, P6 and P6X) and sleeves are of the same lighter gauge material.

    Note: a sleeve must always occur at a purlin joint position.

    Typical double span arrangement indicating purlin and sleeve positions.

    Heavy End Bay System - Typical Double Span Arrangement

    Note: consideration must be given to the handling of longer lengths

  • Detailing

    Typical single span arrangement indicating purlin and sleeve positions.

    Heavy End Bay System - Typical Single Span Arrangement

    Typical double span arrangement indicating purlin and sleeve positions.

    Heavy End Bay System - Typical Double Span Arrangement

    Heavy End Bay System Detailing Information

    Heavy end bay system (mm)

    A B C D E F G H J
    142 42 56 240 44 50 614 308 750
    172 42 86 290 44 50 714 390 914
    202 42 116 350 44 50 834 470 1074
    232 42 146 410 44 50 954 583 1300
    262 42 176 460 44 50 1054 683 1500
    302 52 195 610 55 60 1354 783 1700
    342 52 235 760 55 60 1654 933 2000

    Unless otherwise stated, all required holes are 18mm diameter for M16 bolts and are normally pierced in pairs on standard gauge lines. For ‘General detailing’ notes see General Detailing Information.