Lock and Security Equipment (C-28) · Lesson 2 of 7

Bolts on the Inactive Leaf of a Pair of Doors (Table 1010.2.4)

"Bolts on the Inactive Leaf of a Pair of Doors (Table 1010.2.4)" is lesson 2 of 7 in the Lock and Security Equipment (C-28) Learning Hub. It opens with "Why Egress Doors Are Not Allowed Plain Bolts" and works through 5 short steps, then a worked example you can check yourself against.

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Steps in this lesson

  1. Why Egress Doors Are Not Allowed Plain Bolts
  2. The Three Bolt Types in the Table
  3. How to Read a Row
  4. Fire Rated Pairs Change the Answer
  5. The Workplace Rule in Title 8

The worked example in the course applies this lesson to a realistic job in 3 steps.

What you'll be able to do

  • Explain the main idea of "Bolts on the Inactive Leaf of a Pair of Doors (Table 1010.2.4)" in plain language you can use on the exam.
  • Apply this step with confidence: "How to Read a Row".
  • Apply this step with confidence: "Fire Rated Pairs Change the Answer".
  • Apply this step with confidence: "The Workplace Rule in Title 8".
  • Test yourself on the worked example and the quick-check quiz inside the classroom.
Inactive-Leaf Bolts: Reading Table 1010.2.4Pair of doors, active leaf + inactive leafIs the pair 716 fire rated?ManualboltsAutomaticflush boltsConstantlatching boltsCase 1: Group B, sprinklered building,inactive leaf not needed for capacityPPPCase 2: same pair, but the pair mustcomply with Section 716 (fire rated)NPNP*PCase 3: panic hardware not required,both leaves needed for egress capacityNPPNP* NP unless both doors are self-closing or automatic-closing AND a coordinator closes the inactive leaf first (Table 1010.2.4, note b)All bolts: inactive leaf may have no doorknob, panic hardware or similar operating hardware (1010.2.4, Item 4)Case 1: any of the three | Case 2: constant latching only (flush only with coordinator)Case 3: automatic flush bolts onlyP = permitted NP = not permitted2025 CBC Table 1010.2.4 and 1010.2.4 Item 4; CBC 716.2.6.2; 8 CCR 3235(l)CC
The diagram for this lesson, exactly as it appears in the Learning Hub.

The first steps of this lesson

Step 1: Why Egress Doors Are Not Allowed Plain Bolts

2025 CBC §1010.2.1 says the unlatching of any door or leaf for egress shall require not more than one motion in a single linear or rotational direction to release all latching and all locking devices, and that manual bolts are not permitted. It then lists an exception for the bolts that §1010.2.4, Item 4 allows. A pair of doors is where this shows up in the field: the inactive leaf is normally bolted top and bottom, and the code decides which bolt you may use.

Step 2: The Three Bolt Types in the Table

2025 CBC Table 1010.2.4 has three columns: surface- or flush-mounted manual bolts, automatic flush bolts, and constant latching bolts. §1010.2.4, Item 4 allows them on the inactive leaf of a pair of doors in accordance with the table, provided that the inactive leaf does not have a doorknob, panic hardware or similar operating hardware. If a leaf has a knob or a bar, it is an active leaf and no bolt from this table may be used on it.

The remaining 3 steps, the worked example and the quiz are in the course. This is a preview. The full lesson, with the step-by-step explanations, a worked example and a quick-check quiz, is inside the classroom.

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