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    Chapter 2 · The 39 Avot Melakhot

    Building order - Building and demolishing

    Lesson 12 of 28 22 min

    Building and demolishing are not only walls. They include assembly, disassembly, tightening and loosening. Practical: opening an umbrella, assembling a child's playpen, snapping Lego.

    Lesson goals
    • 01Define "building" - joining what stays in place
    • 02Understand why opening an umbrella is forbidden (SA OC 315)
    • 03Distinguish temporary assembly (permitted) from permanent (forbidden)
    01

    Melakha Boneh: Foundations of Building

    The melakha of Boneh (Building), one of the 39 forbidden labors on Shabbat, is not limited to constructing houses. It is far broader, encompassing any act of joining parts together to create a structure or an implement.

    משנה שבת ז:ב (בבא מציעא קב ע"א)
    כל העושה דבר שקיימא, חייב משום בונה.

    Anyone who makes something that endures and has permanence is liable for Boneh.

    Insight

    The concept of 'Kaima' – permanence and stability – is key to understanding this melakha. This is the guiding principle: Does the action create something stable and lasting?

    בונהBoneh
    The primary forbidden labor that prohibits any act of joining parts together in a permanent or significant way, to create a structure, implement, or a significant repair.
    02

    Distinguishing Permanent from Temporary

    The central distinction in the melakha of Boneh is between permanent joining and temporary joining. Permanent joining is forbidden; temporary joining, intended for immediate disassembly, is permitted.

    1. 1Ask: Is the connection intended to remain this way for an extended period?
    2. 2If yes: It is likely the melakha of Boneh.
    3. 3If no: If it's a very loose and temporary connection, it might be permitted.
    Insight

    The definition of 'permanent' can vary depending on the nature of the object. What is considered permanent in a temporary structure (like a tent) is not the same as permanence in a stone building.

    03

    Practical Examples: Umbrella and Lego

    Opening an umbrella on Shabbat is a classic example of a connection that falls under the prohibition of Boneh. Even though it opens and closes, when opened, it creates a 'tent' that is permanent for the duration of its use, and is considered building.

    שולחן ערוך אורח חיים שט"ו:ג
    אסור לפתוח מטרייה בשבת, משום בונה או מפרק אוהל.

    It is forbidden to open an umbrella on Shabbat, because it is building or dismantling a temporary tent.

    In contrast, assembling Lego bricks or similar construction toys, if their purpose is play and immediate disassembly, is not considered Boneh. However, if the child builds a complex structure and intends to leave it for a long time, it then enters the forbidden category.

    04

    Melakha Soter: The Complementary Opposite

    The melakha of Soter (Demolishing) is the complementary opposite of Boneh. Any act of dismantling a structure or implement in a way that is intended for repair or rebuilding is forbidden. Dismantling for mere destruction or temporary dismantling is not included in this prohibition.

    סותרSoter
    The primary forbidden labor that prohibits any significant act of dismantling a structure or implement, as preparation for building or repair.
    Insight

    The connection between Boneh and Soter is tight. Both deal with a fundamental change in the state of an object, whether by creating it or by preparing it for new creation.

    Practice

    Describe 3 assembly acts at home. Classify each: building, demolishing, or permitted.

    Lesson wrap-up

    Boneh teaches: not every assembly is forbidden, but every forbidden assembly stems from it.

    Check your understanding

    Test yourself before marking the lesson complete.

    Question 1 of 4

    Which definition best describes the melakha of 'Boneh' on Shabbat?

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