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**Intro to Creating Stairways**

Architecture Intro to Creating Stairways

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**Terms for Stairs Handrail Landings 30” high on slope**

34” high on landings Landings Flat floor area connected to stairs

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Cast Concrete Stairs

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**Terms of Stairs Baluster Tread Vertical member holding handrail**

Horizontal parts of the steps 1” to 1.25” thick 10.5” to 11.5” deep

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**Terms for Stairs Riser Nosing Vertical parts of the steps .75” thick**

7” to 7 5/8” high Nosing Overhang of the tread Approximately 1”

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**Terms for Stairs Stringer**

Diagonal members, notched to hold risers and treads Min. of 2 needed If over 3’, then 3 is needed

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**Terms for Stairs Headroom Total Rise Total Run**

Minimum distance from slope to ceiling is 6’6” minimum Total Rise Floor to floor measurement Total Run Distance from front of first step to end of last (landing to landing)

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Types of Stairs Straight L Double L U Winder Spiral Circular

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**4 Rules to calculating stairs**

Slope must be degrees 2 risers and 1 tread=close to 25” 1 riser X 1 tread=close to 75” 1 riser + 1 tread=close to 17”

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**Procedure in Planning Step 1**

Determine the total rise (floor to floor) Example: Floor to ceiling 8’ Ceiling ½” Ceiling joist ¼” 2nd floor sub floor ¾” 2nd floor, floor ½” Total rise= 107”

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**Procedures in Planning Step 2**

Figure out NUMBER and SIZE of risers Divide total rise by 7 (for starters) Round this number to an exact # (15, 16) Divide this # into total rise to get actual size of risers

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**Example Cont. 107” divided by 7=15.28 Round this number to 15 or 16**

Divide 107 by 15=7.13 Divide 107 by 16=6.6 This is the actual size of the risers!!!!!

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**Procedures in Planning Step 3**

Figure out NUMBER and SIZE of tread Use rule #2 to find size (around ) Recheck with rule 3 and 4 Always one less tread than riser # of treads x tread size must equal total run

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**Things you have to calculate**

Total rise= Total run= Rise of step= Run of step= (tread)( ) # of risers= # of treads= Angle of stairs= Handrail height=

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**Other Steps 4. Draw riser, tread grid pattern**

5. Darken riser, tread and nosing 6. Draw stringer (usually 12”) 7. Find rough opening (min 6’6”) 8. Recheck Detail with balusters, handrails, etc.

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**Other steps 8’10”=106” 106 divided by 7=15.14 Round down to 15**

106 divided by 15=7.06 actual riser height 10.5 tread 15 risers 14 treads

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