2. Raffles International Institute WEEKLY SCHEDULE
DIVISON ACCORDING TO:
1.STRUCTURAL LOAD-BEARING SYSTEM: PRECAST, STRINGS,
CANTELIVER ...
2.TYPE OF CONSTRUCTION: RAINFORCED CONCRETE,
WOODEN, STEEL, GLASS ...
3.MATERIALIZATION OF STAIRCASE AND BALUSTRADE
4.POSITION IN BUILDING: INTERIOR OR EXTERIOR
5.PURPOSE: MAIN OR AUXILIARY
6.SHAPE OF THE FLIGHTS: STRAIGHT, SPIRAL, HELICAL,
MATHEMATICAL, MIX ...
7.NUMBER OF FLIGHTS: SINGLE, HALF-TURN, 2, 3 FLIGHTS ...
3. Raffles International Institute WEEKLY SCHEDULE
STAIRCASE CALCULATION:
TREAD / RISER/NUMBER OF HEIGHTS / LENGTH OF FLIGHT
1. RELATION BETWEEN RISER HIGHT AND TREAD MEASUREMENT SHALL
BE PROPORTIONAL TO LENGTH OF HUMAN STEP (63-65CM)
2. IN BUILDINGS RISER HEIGHTS ARE BETWEEN 14 – 19 CM ( ALL BELLOW
14CM IS CONSIDERED AS RAMP, AND HIGHER THAN 19CM AS STEEP
STAIRCASE). 16/31; 17/29; 18/27 ; 19/25
3. MAX DISTANCE BETWEEN BALUSTRADE NEWEL IS 12 cm.
MIN BALUSTRADE HEIGHT IS 100 cm.
MIN WIDTH OF STAIRCASE IS 80 cm (70). LARGER THAN 90 cm IS
CONSIDERED COMFORTABLE FOR HUMAN USING AND MOVING
FURNITURE.
4. Raffles International Institute WEEKLY SCHEDULE
TREAD / RISER/NUMBER OF HEIGHTS / LENGTH OF FLIGHT
3. FORMULA:
B = (63 – 65) – 2 X H
Min number of treads in a single flight is 3 and max between 12-15 before landing
platform.
B
H
A
6. RAFFLES October 2012
Raffles International Institute STRUCTURAL SYSTEMS
VERTICAL
COMMUNICATION
RAMPS, 15 º STAIRCASE STEEP
STAIRCASE
ELEVATOR
7. RAFFLES October 2012
Raffles International Institute STRUCTURAL SYSTEMS
VERTICAL
COMMUNICATION
RAMPS, 15 º STAIRCASE STEEP
STAIRCASE
ELEVATOR
TYPE OF STAIRCASES
9. RAFFLES October 2012
Raffles International Institute STRUCTURAL SYSTEMS
WIDTH OF STAIRCASES
1.A = 80 (70) CM
2.A = 90 CM
3.A = 120 CM
4.A = 150 CM
5.A = 180, 210 CM
10. Raffles International Institute TYPOLOGY AND ELEMENTS
TYPES OF LOAD BEARING SYSTEM:
1.PRECAST CONCRETE
WALL-WALL OR WALL TO BEAM
2. STEEP STRINGS: CENTRAL OR SIDE
3. CANTILEVERED
4. LOAD-BEARING BEAMS
5. MONOLITHIC RC STAIRCASE
11. Raffles International Institute TYPOLOGY AND ELEMENTS
TYPES OF LOAD BEARING SYSTEM:
1. PRECAST OR PARTLY PREFABRICATED
01. side stringers 02. landing beams 03. central stringer
prefabricated
13. Raffles International Institute TYPOLOGY AND ELEMENTS
TYPES OF LOAD BEARING SYSTEM:
3. FULLY PREFABRICATED / CANTILEVERED
01. cantilevered 02. side stringers 03. central stringer
prefabricated
17. Raffles International Institute TYPOLOGY AND ELEMENTS
TYPES OF LOAD BEARING SYSTEM:
5. MONOLITHIC RC STAIRCASE
01. beam-slab-beam 02. cranked slab 03. beam-slab-wall
19. Raffles International Institute TYPOLOGY AND ELEMENTS
STEEL STAIRCASES:
CONSTRUCTION ELEMENTS: SIDE STRINGERS, LANDING
ANGLE BLOCK, LANDING PLATFORM, BALUSTRADE
20. Raffles International Institute TYPOLOGY AND ELEMENTS
STEEL STAIRCASES:
1.OPEN STEEL STAIRCASES:
CENTRAL STRINGER, SADDLE, LANDING ANGLE BLOCK,
BUTTRESS
21. Raffles International Institute TYPOLOGY AND ELEMENTS
STEEL STAIRCASES:
2. CLOSED STEEL STAIRCASE: PREFABRICATED CLOSING
FRONT
22. Raffles International Institute TYPOLOGY AND ELEMENTS
WOODEN STAIRCASE:
ELEMENTS:
1. PRIMARY:
STRINGERS,
BUTTRESS,
LANDING ANGLE BLOCK
2. SECUNDARY:
LANDING PLATFORM,
CONNECTIONS,
BALUSTRADE
38. Raffles International Institute TYPOLOGY AND ELEMENTS
CASE STUDY – HELICAL STAIRCASE
RESIDENTIAL SPACE
STEEL STRINGER / STEEL BEAMS /
COLUMNS
GLASS AND METAL BALUSTRADE