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Appendix E: Space

Requirements

33P A R T

33

H V A C E Q U AT I O N S , D A TA , A N D R U L E S O F T H U M B

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720 PART 33

33.01 Space Requirements

Ceiling Plenum Space

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 Appendix E: Space Requirements 721

Ceiling Plenum Space

 Notes for Ceiling Plenum Space Tables:1. Assumptions: 2″  fire proofing on beam, 6″  fluorescent light depth, 51 ⁄ 2″  floor slab thickness, 2″ 

suspended ceiling thickness.2. For depth from beam to ceiling, add 4″  to above figures.

3. For depth from underside of slab to light, add depth of beam plus 2″ .

4. * indicates beam protruding through ceiling.

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722 PART 33

Pipe Spacing on Racks

 Notes for Pipe Spacing on Racks Tables:1. Table based on Schedule 40 pipe and includes the outside dimensions for flanges, fittings, etc.;

insulation over flanges, fittings, etc.; and space between fittings as follows:a. Pipe sizes: 2″  and smaller: 11 ⁄ 2″  Insulation.

Pipe sizes: 21 ⁄ 2″  and larger: 2″  Insulation. b. Space between two pipes 3″  and smaller: 1″ .c. Space between one pipe 3″  and smaller and one pipe 4″  and larger: 11 ⁄ 2″ .

d. Space between two pipes 4″  and larger: 2″ .2. For Schedule 80 and 160 pipe and 300 lb. fittings add the following:

a. Pipe sizes 4″  and smaller: 1″ . b. Pipe sizes 5″  to 12″ : 11 ⁄ 2″ .c. Pipe sizes 14″  and larger: 2″ .

3. Tables do not include space for valve handles and stems, expansion joints, expansion loops, andpipe guides.

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 Appendix E: Space Requirements 723

 Notes for Pipe Spacing on Racks Tables:1. Table based on Schedule 40 pipe and includes the outside dimensions for flanges, fittings, etc.;

insulation over flanges, fittings, etc.; and space between fittings as follows:a. Pipe sizes: 2″  and smaller: 11 ⁄ 2″  Insulation.

Pipe sizes: 21 ⁄ 2″  and larger: 2″  Insulation. b. Space between two pipes 3″  and smaller: 1″ .c. Space between one pipe 3″  and smaller and one pipe 4″  and larger: 11 ⁄ 2″ .

d. Space between two pipes 4″  and larger: 2″ .2. For Schedule 80 and 160 pipe and 300 lb. fittings add the following:

a. Pipe sizes 4″  and smaller: 1″ . b. Pipe sizes 5″  to 12″ : 11 ⁄ 2″ .c. Pipe sizes 14″  and larger: 2″ .

3. Tables do not include space for valve handles and stems, expansion joints, expansion loops, andpipe guides.

Pipe Spacing on Racks

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724 PART 33

Pipe Spacing on Racks

 Notes for Pipe Spacing on Racks Tables:1. Table based on Schedule 40 pipe and includes the outside dimensions for flanges, fittings, etc.;

insulation over flanges, fittings, etc.; and space between fittings as follows:a. Pipe sizes: 2″  and smaller: 11 ⁄ 2″  Insulation.

Pipe sizes: 21 ⁄ 2″  and larger: 2″  Insulation. b. Space between two pipes 3″  and smaller: 1″ .c. Space between one pipe 3″  and smaller and one pipe 4″  and larger: 11 ⁄ 2″ .

d. Space between two pipes 4″  and larger: 2″ .2. For Schedule 80 and 160 pipe and 300 lb. fittings add the following:

a. Pipe sizes 4″  and smaller: 1″ . b. Pipe sizes 5″  to 12″ : 11 ⁄ 2″ .c. Pipe sizes 14″  and larger: 2″ .

3. Tables do not include space for valve handles and stems, expansion joints, expansion loops, andpipe guides.