ANSI/ASC A14。5-2017规定了各种类型和样式的便携式增强塑料梯子的安全施工、设计、测试、维护和使用规则。包括的梯子类型包括:工作负荷:额定负荷梯子类型（磅）特殊DUTYIAA375超重型DUTYIA300重型DUTYI250中型DUTYI225轻型DUTYIIIiIiIiI200梯子类型包括阶梯式脚凳、便携式扩展、台阶、栈桥、分段式、组合式、单梯、平台式和铰接式梯子，但不包括矿山、消防设施、移动设备、起重设备、，工作平台、天线通信塔、传输塔、电线杆和烟囱。它不包括特殊情况- 用途:不符合本标准一般要求的梯子，也不包括梯子附件，包括但不限于可能安装在梯子上或与梯子一起使用的梯子调平器、梯子稳定器或隔离装置、梯子千斤顶或梯子带或挂钩。注:A14覆盖了阶梯式凳子。5.人们认识到，目前正在制定一种脚凳标准。当踏板标准获得批准时，A14。5将不再覆盖阶梯式踏板。这些要求还旨在规定本标准中引用的各种便携式梯子的标签/标记规则和标准，但不包括家具式踏脚凳和专用梯子。 这些标签/标记要求不适用于培训、监督或记录的安全程序可能与这些标签/标记要求冲突或替代这些标签/标记要求的情况。

ANSI/ASC A14.5-2017 prescribes rules governing the safe construction, design, testing, care and use of portable reinforced plastic ladders of various Types and styles. Ladder Types included are:Working Load:Duty RatingLadder Type(Pounds)Special DutyIAA375Extra Heavy-DutyIA300Heavy- DutyI250Medium-DutyII225Light-DutyIII200Ladder styles include ladder type step stools, portable extension, step, trestle, sectional, combination, single, platform, and articulating ladders, but excluding ladders in and on mines, the fire services, mobile equipment, hoisting equipment, work platforms, antenna communications towers, transmission towers, utility poles, and chimneys. It does not cover special-purpose ladders that do not meet the general requirements of this standard, nor does it cover ladder accessories, including, but not limited to, ladder levelers, ladder stabilizers or stand-off devices, ladder jacks, or ladder straps or hooks, that may be installed on or used in conjunction with ladders. Note: Ladder type step stools are covered by A14.5. It is recognized that a step stool standard is under development. When the step stool standard is approved, A14.5 will no longer cover ladder type step stools. These requirements are also intended to prescribe rules and criteria for labeling/marking of the kinds of portable ladders cited in this standard, but exclusive of furniture type step stools and special purpose ladders. These labeling/marking requirements do not apply to those situations where training, supervision, or documented safety procedures would be in conflict, or serve in lieu of, these labeling/marking requirements.