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Feasibility of ECS accommodation in Residential Plots
 

Feasibility of ECS accommodation in Residential Plots

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    Feasibility of ECS accommodation in Residential Plots Feasibility of ECS accommodation in Residential Plots Presentation Transcript

    • Feasibility of ECS accommodation/ Parking in Residential Plots of varying sizes. M/s UTTIPEC, DDA 1
    • Objectives • To test the feasibility of accommodating the required ECS within stilts for all plots > 50sqm as per National Building Code and other architectural standards with reference to Master Plan Delhi-2021 norms. • To achieve ‘eyes on streets’ through design by ensuring active (building) frontages along streets in addition to stilt parking, for safety and improved urban form. 2
    • Stilts – a parking solution but a threat to public safety on streets • Streets remain unwatched • Street level activity reduces manifold • Sense of safety compromised. 3
    • National Building Code: Norms Part-3: Development Control Rules & General Building Requirements, • Clause 9.6.3.3; One car parking space for every two flats up to 90 sqm floor area and one for every flat for 100 sqm or more shall be provided. • Clause 9.6.4 With a view to providing adequate parking for occupancies and the vehicular load, appropriate off-street parking provisions have to be made in the building/on-site. • Clause 10.3; Each off-street parking space provided for vehicles shall be as follows: a) b) • For car, the minimum parking space to be 3m x 6m when individual parking space is required and 2.75 m x 5 m when common parking space is required. Space for scooter/two wheeler and bicycle to be not less than 1.25 sqm and 1.00 sqm respectively. 12.2.1 Height: The height of all rooms for human habitation shall not be less than 2.75 m measured from the surface of the floor to the lowest point of the ceiling (bottom of slab). 4
    • National Building Code: Norms Part-3: Development Control Rules & General Building Requirements, • 12.2.2 Size : The area of habitable room shall not be less than 9.5 sqm, where there is only one room with a minimum width of 2.4 m. Where there are two rooms, one of these shall not be less than 9.5 sqm and the other not less than 7.5 sqm, with a minimum width of 2.1 m. Part-3 Clause 9.4.1. (Note- 3); & Part-4 : Fire & Lift Safety, Clause 3.4.5 (Note: 4a) • The FAR specified maybe increased by 20 percent for the following: – A basement or cellar and space under a building constructed on stilts and used as a parking space, and air-conditioning plant room used as accessory to the principal use. 5
    • Master Plan Delhi-2021: Norms As per Part-2, Chapter-3, Clause: 4.4.3 CONTROL FOR BUILDING/BUILDINGS WITHIN RESIDENTIAL PREMISES A. Residential Plot-Plotted Housing 6
    • MPD-21, Chapter-2, Clause: 4.4.3 CONTROL FOR BUILDING/BUILDINGS WITHIN RESIDENTIAL PREMISES A.Residential Plot-Plotted Housing Terms and Conditions ; (vi) Basement area shall not extend beyond the coverage on the ground floor as per permissible and sanctioned built-up area, but may extend below the internal courtyard and shaft. (The study assumes that the basement extends up to the Set back line on all sides) (vii) Stilts: If the building is constructed with stilt area of non-habitable height (less than 2.4m), used for parking, such stilt area shall not be included in FAR but would be counted towards the height of the building. (viii) Parking space shall be provided for within the residential plot as follows: a)2 Equivalent Car Space (ECS) in plots of size 250-300 sq.m. b)1 ECS for every 100 sqm built-up area, in plots exceeding 300 sqm. 7
    • MPD-21, Chapter-2, Clause: 4.4.3 CONTROL FOR BUILDING/BUILDINGS WITHIN RESIDENTIAL PREMISES (x) The minimum setbacks shall be as given in the following table : Thus, Calculation of total permissible ECS for various plots sizes is as follows: Set Backs Plot size (sqm) Front 50 75 160 300 500 750 1000 Rear 0 0 3 3 3 6 6 Side (1) Side (2) 0 0 0 3 3 3 3 0 0 0 3 3 3 3 0 0 0 0 0 3 3 FAR 350 350 300 225 225 225 150 Permissible Permissible ECS D.U.s (as/MPD-21) (as/MPD-21) 3.5 3 3.5 4 3 4 2.3 6 2 2.3 6 11 2.3 6 16 1.5 9 15 Built-up Permissible area No. of Floors 175 263 480 675 1125 1688 1500 8
    • THUS… General parameters for Stilt/Basement Parking 1. Parking provision for all permissible dwelling units [as per MPD-2021 (Part-2, Chapter3, clause 4.4.3)] in plots less than or equal to 250 sqm has been calculated as per NBC (Part-3, clause 9.6.3.3) since MPD-2021 does not specify parking requirement for smaller plots. 2. Stilt parking is maintained within the building line, i.e. ground coverage in addition to spaces beneath shafts, internal courtyards and balcony projections. 3. Since parking in stilts is not enclosed, therefore single entry/exit for vehicles could be provided (as per observation from NBC). 4. Stilt parking size: minimum of 5 M x 3 M (ref. NBC). 5. Basement parking bay (min.) should be 5 M x 2.5 M 6. Vehicular aisle width = 6.1 M (min.) when its doubly loaded at 90 degree (ref. NBC & Neuferts), and vehicular aisle width = 4M (min.) when its singly loaded. 7. Internal turning radius = minimum 3m (ref. Neuferts). 8. To meet the ECS requirement, driveway has been provided within set-back area. 9. Ramp to stilts to be no be steeper than 1:8 as per Times Savers Standards. 10. Minimum ramp width is 3 M as per Neufert’s Parking standards. 11. Minimum ramp gradient should not exceed 15%, which is 1:8 slope, as per Neufert’s Parking standards. 9
    • Basement Parking : Design Solutions for Varying Plot Sizes 10
    • Test Case 1. Three Plot Sizes were selected for testing the feasibility of basement parking:   750 SQM  2. 500 SQM 1000 SQM Plot dimensions for the 3 above listed plot sizes were based on existing plots in Delhi as far as possible. 3. Plots < 500 SQM were not tested in detail as initial studies revealed that Basement Parking was not feasible in such cases
    • Plot Size = 500 sqm Assumptions & standards • Min. Ramp width = 3.0 M • Max. Ramp gradient =1:8 • Min. Turning radius = 5.78M • Min. Clear zone for parking = 6.0M • Min. Parking bay = 5.0 M x 2.5 M • Entry/exit to Parking ramp to be located within the building envelop line. ECS requirement not met within Basement Set Backs Plot size (sqm) Front 500 Rear 3 Side (1) Side (2) 3 3 0 FAR 225 Achieved Built-up Permissi ECS (in area ble ECS Basemen t) 1125 11 6
    • Plot Size = 750 sqm Assumptions & standards • Min. Ramp width = 3.0 M • Max. Ramp gradient =1:8 • Min. Turning radius = 5.78M • Min. Clear zone for parking = 6.0M • Min. Parking bay = 5.0 M x 2.5 M • Entry/exit to Parking ramp to be located within the building envelop line. ECS requirement not met within Basement Set Backs Plot size (sqm) Front 750 Rear 6 Side (1) Side (2) 3 3 3 FAR 225 Achieve d ECS Built-up Permissi (in area ble ECS Baseme nt) 1687.5 16 8
    • Plot Size = 1000 sqm Assumptions & standards • Min. Ramp width = 3.0 M • Max. Ramp gradient =1:8 • Min. Turning radius = 5.78M • Min. Clear zone for parking = 6.0M • Min. Parking bay = 5.0 M x 2.5 M (end-on parking) • Min. Parking bay = 6.0 M x 2.5 M (parallel) • Entry/exit to Parking ramp to be located within the building envelop line. 1. 2. ECS requirement met (through Basement + Surface level Parking) 2 of 15 ECS to be located on-plot at surface level Set Backs Plot size (sqm) Front 1000 Rear 6 Side (1) Side (2) 3 3 3 FAR 150 Achieve d ECS Built-up Permissi (in area ble ECS Baseme nt) 1500 15 13
    • Summary of findings 1. Basement parking is not feasible in plots < 1000 SQM 2. In case of a 1000 SQM plot, ECS requirement is met only when limited (2 of 15 ECS) on-plot surface parking is provided in addition to basement parking 3. Basement Parking is not feasible in any Plot with frontage length less than 14.0M
    • Stilt Parking : Design Solutions for Varying Plot Sizes 16
    • Typology for Smaller Plots (Plots < 250 sqm) 17
    • Plot Size = 50 sqm • Stilt parking is permissible only for • No ECS is mentioned as per Master Plan Delhi-2021. Building Code, Thus Part-3, National Clause 9.6.3.3, 1 ECS is permissible subject to Street Section plots with access road =/ > 6M the area under stilts being counted • Minimum habitable space of 9.5 sqm as per NBC is mandatory for plots having frontage of 8M or above. Street Form with Frontage against FAR 18
    • Plot Size = 75 sqm Street Section Street Form with Frontage Case 2 Case 1 • 1 ECS is permissible as per NBC. For having 2 ECS, complete stilt parking will be counted in FAR (as in Case 2). • Minimum habitable space as per NBC is mandatory for plots having frontage of 8M or above (as in Case 1). 19
    • • • • No ECS is mentioned as per MPD-21, thus referring to NBC, 2 ECS is permissible. Stilt parking could be exempted from FAR, subject to stilt height of 2.4 M maximum as per Master Plan Delhi2021. Minimum habitable space of 9.5 sqm as per NBC is mandatory for plots having frontage of 8M or above. Parking is not permissible in setback area. Street Form with Frontage • Street Section Plot Size = 104 sqm 20
    • Plot Size = 160 sqm Street Section • • No ECS is mentioned as per MPD-21, thus referring to NBC, ECS requirement has been calculated as 2.7 which is rounded off to 3 ECS. Minimum habitable space as per NBC is mandatory for plots having frontage of 8M or above. Parking is not permissible in set-back area. Street Form with Frontage • 21
    • Plot Size = 200 sqm Street Section Street Form • No ECS is mentioned as per MPD-21, thus referring to NBC, ECS requirement has been calculated as 3.3 which is rounded off to 3 ECS. • Minimum habitable space as per NBC is mandatory for plots having frontage of 8M or above. • Parking is not permissible in set-back area. 22
    • Typology Option # 1: Ramp down to parking (for Plots > 250 sqm) Lvl + 1.05m Lvl – 1.4m Lvl + 0.45m Lvl + 00m Allows for connected habitable spaces at ground level 23
    • Typology Option # 2: Ramp up for parking (for Plots > 250 sqm) Lvl +3.3m Lvl +2.4m Lvl +1.2m Lvl + 00m Allows for basement and permits light/ ventilation to the same 24
    • Plot Size = 250 sqm Street Form with Frontage Street Section • 2 ECS is permissible as per MPD-2021, whereas 4.2 (rounding off to 4) ECS is permissible as per NBC. Additionally, the proposed design solution can accommodate 4 ECS in stilts without consumption of FAR. • Min. habitable space of 9.5 sqm as per NBC is mandatory for plots having frontage of 8M or above. • Parking is not permissible in set-back area. 25
    • Plot Size = 300 sqm Street Form Street Section • 2 ECS is permissible as per MPD-2021, whereas 3.8 (rounding off to 4) ECS is permissible as per NBC. Additionally, proposed design solution can accommodate 4 ECS in stilts without consumption of FAR. • Minimum habitable space of 9.5 sqm as per NBC is mandatory for plots having frontage of 8M or above. • Boundary wall to have (min.) 50% visibility along the access street as per the UTTIPEC Street Design Guidelines to ensure overlooking. • Parking is not permissible in set-back area. • Min. 30% of front set back to be soft green. 26
    • Plot Size = 500 sqm • 11 ECS is permissible as per MPD-2021, whereas 6.3 (rounding off to 6) ECS is permissible as per NBC. Proposed design solution accommodates maximum ECS requirement of 11 without consumption of FAR. • Parking is not permissible in front set-back area. Case 1 Case 2 27
    • Plot Size = 500 sqm Street Form with Frontage 1.2 Street Section • Minimum habitable space as per NBC is mandatory for plots having frontage of 8M or above. • Atleast 50% of building frontage to be designed as a habitable space. • Boundary wall to have (min.) 50% visibility along the access street as per UTTIPEC Street Design Guidelines. • Min. 30% of front set back shall be soft green. 28
    • Plot Size = 750 sqm • 16 ECS is permissible as per MPD-2021, whereas 9.4 ECS is permissible as per NBC. The proposed design solution accommodates the maximum ECS of 16 without consumption of FAR with 11 parking spaces in stilts and 5 in setbacks. • Min. 30% of front set-back to be under soft green. Case 1 Case 2 29
    • Plot Size = 750 sqm Street Form with Frontage Street Section • 50 % of the building frontage to be designed as a habitable space. • Front plot boundary to have (min.) 50% visibility along the access street as per UTTIPEC Street Design Guidelines. 30
    • Plot Size = 1001 sqm • 15 ECS is permissible as per MPD2021, whereas 8.3 ECS is permissible as per NBC. The proposed design solution accommodates the maximum ECS of 17 (2 > permissible) with 14 parking spaces in stilts and 3 in set-back area. Permissible ECS =15 Achieved ECS = 14+3 • Min. 75% of front set-back to be under soft green. • No portion of building frontage to be used for parking. • Front plot boundary wall to have (min.) 50% visibility along the street as per UTTIPEC Street Design Guidelines. 31
    • Plot Size = 1001 sqm • Stilts are allowed only on plots abutting access road width of 6M and above. • Maximum plinth level for any plot having stilts shall not exceed 1.4 M. • Higher plinth of stilts provides for the natural ventilation of basement (if built). Street Section Street Form with Frontage 32
    • Stilt Parking : Conclusions & Recommendations 33
    • Recommendation: Permissible ECS Plot size bifurcation 50-100 Plot size (sqm) 50 FAR 350 Permissible ECS Built-up Permissible D.U.s Permissible ECS Design (1 ECS/2 D.U.s of area (as/MPD-21) (as/MPD-21) Solution 90 sqm each)* 175 3 1 Proposed Maximum ECS 1 1 75 Above 100-150 Above 150below 250 350 263 4 1.5 1 104 350 364 4 2.0 2 160 300 480 4 2.7 3 3 200 250-300 2 300 600 4 250 300 750 4 3.3 2 3 4.2 4 4 300 Above 300below 1000 225 675 6 2 3.8 4 500 225 1125 6 11 6.3 11 As/ MPD-21 750 1000 & above 225 1688 6 16.88 9.4 16 1000 150 1500 9 15 8.3 17 As/ MPD-21 *As per National Building Code, Part-3, Clause 9.6.3.3 34
    • Recommendation: Design norms Plot size bifurcation 50-100 Above 100-150 Above 150below 250 250-300 Above 300below 1000 1000 & above Plot Proposed size Maximum (sqm) ECS FAR Mandatory Conditions Front Set-Back Building frontage Plot frontage Boundary Wall One extra ECS is 30% shall be soft As per design Plots with permissible green; Parking not frontage = to > 1 N.A. subject to area permissible. 8M to have 75 of stilt parking some habitable being counted space 50% of frontage Boundary wall 104 2 against FAR may constitute stilt (as/NBC)** shall be abutting the parking perforated with 160 front set-back a minimum of 3 or access street 50% visibility 200 (as applicable). along access street, to 250 comply with 4 UTTIPEC’s 300 Street Design Guidelines. 30% shall be soft 500 green; Parking As/ MPDN.A. permissible in set21 750 backs > 6 M Stilt parking shall As/ MPD75% shall be soft 1000 not form building 21 green frontage 50 35
    • Recommendation: Design norms • • Stilts are allowed only on plots along access road of 6M and above. Maximum plinth level for any plot with stilts shall not exceed 1.4 M. Recommendations • Higher plinth of stilts provides for natural ventilation of basement (if built). • Stilt parking must have driveway for plots above 250 sqm, where driveway could be taken into set-back. 36
    • Thus…. Objectives fulfilled! • ECS proposed for smaller plots with reference to NBC. • ECS requirement met in stilts with reference to MPD-2021. • Creation of safe streets with active frontages. 37
    • Thank You! 38