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Published byDwain Dixon Modified 11 months ago

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Architecture Intro to Creating Stairways

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Terms for Stairs Handrail 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 Vertical member holding handrail Tread Horizontal parts of the steps 1” to 1.25” thick 10.5” to 11.5” deep

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Terms for Stairs Riser 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 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 9 ¼” 2 nd floor sub floor ¾” 2 nd 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 divided by 15=7.06 actual riser height 10.5 tread 15 risers 14 treads

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