HomeMy WebLinkAboutLETTERS01
KMA Engineering & Surveying, LLC
80 Rdyal Palm Pointe, Suite 401
V6ro Beach, FL 32960
KMA(772) 569-5,505
NNhU-
May 13, 2020 _SG�
Rt i ul
David Johnson
St Lucie County
Building Department
RE: AcquaVista Lot 2 - 4416 N. Hwy Al A
Permit No. 1901-0541
I do hereby certify that:
That the front steps have been construc ed in accordance with all applicable FBC 2017
standards. They have been constructed�a5 a frangible element; with ,hollow-
unreinforced masonry retaining -walls on frangible footers (12"x16"j and with a soil -
supported slab saw cutjo.n.o larger than 5'x5'.. These are in accordance with FDEP and
FEMA guidelines, and ar . e not -structurally connqcted to the main residence.
If you have any questions. please do not hesitate to contact me.
David S. Knight,, P.E.
FL Reg. No. 41060
\1 8-19 a Ic 41 100319
V.
KMA Engineering & Surveying, LLC
2* 140' Avenue, Suite 3
KMA V7Beach, FL 32960
772) 569-5505
December 21, 2021
Lynn Swartzel
Environmental Specialist
St. Lucie County
2300 Virginia Ave
Ft. Pierce, FL 34982
RE: Lot 2 Aquavista
Dear Ms. Swartzel,
1, David S. Knight, P.E., have inspected the ligh
that it is in compliance with the approved FDEP
If You have any questions please do not hesitate
Mvid S. Knigk
-�L Red'.,No. Z�Q
at the above referenced property and certify
istal Permit as issued.
contact me.
I
KMA En'gmeenng.& Surveying, LLC
80 Royal Palm Poinfe,'Suite 401
Ver8,Beiach, FL 32960
(772) 569-5505 -
KMA
May 28, 2020 SGAMYt-0) -
David Johnson
St Lucie County
Building Department
RE: AcquaVista Lot 2 - 4416 N. Hwy Al A
Permit No. 1901-0541
We have determined, based on worst -case conditions, the minimum number of concrete screw
anchors required to withstand the shear force applied to the wood buck for all windows and
doors for the above referenced project.
The force has been determined for each side of eaco window/door based on ASCE 7-10 with
170 MPH Vult, EXPOSURE D ENCLOSED, 30'MEAN HEIGHT, 5:12 PITCH, with Kd=0.85
I
using the ALLOWABLE STRESS DESIGN method. These values are representative of the
minimum tributary area (1 0-sqft); the actual wind pressure for any component larger the 1 0-sqft
would be less.
The shear tolerance for the anchors is based on 1/4"xT'�TapCons (or equal) with a minimum one -
inch (1 ") embedment into medium weight hollow block with a factor of safety of 4:1 (25%
ultimate load values). Further load reductions have app lied for less than nominal spacing and
edge distance, in accordance with manufacturer recommendations.
I do hereby certify that:
• The fasteners used for the installation of all windows and doors for the above referenced
project meet or exceed our requirements (as described above).
• The number of fasteners used to secure all exterior� windows and doors for the above
referenced project meets or exceeds our calculated equirement for the buck
attachment.
• The attachment of the wood buck to the masonry via, concrete screw anchor through the
associated window frame and into the masonry, in conjunction with our preceding
certifications, is in accordance with FBC 2017 require' , ments.
The following pages contain an accounting of all installed windows and doors, with the
calculated wind force and fastener requirements. Noted on each is the actual number of
fasteners installed. If you have any questions please do not hesitate to contact me.
David S. Knight, P.E.
FIL R!�q&.Z,
AlT1020
\1 8-022rLot 8 sic 091919 ced 100319
J:\18-022 Sion Homes ref Aquavistc\Drawings\Structural\Lot 2\18-022 AQVSTA LOT 2 STRUCTURAL-2.5.dwg
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GROUND f LOOK DOOR
ATTACHMENT SICHEDULE
MARK
*MAXIMUM'
PRESSURE,
TRIBUTARY
AREA
TRIBUTARY AREA
TOTAL FORCE
"MINIMUM FASTENER -
COUNT per SIDE
001
PART OF ASSEMBLY WITH WINDOW 101 & 102 (see below)
002�
GARAGE DOOR - INSTALL PER MANUFACTURER SPECIFICATIONS
003
-69.3 psf
5.00 SF
346.50 lbs.
3*** OK
004
DOOR NOT EXPOSED (INTERNAL INSTALLATION)
005
-56.1 psf
5.25 SF
294.53 lbs.
2*** NI
006
-56.1 psf
5.00 SF
280.50 lbs.
___,2 OK
GROUND f=LOOR WINDOW
ATTACHMENT SICHEDULE
MARK
*MAXIMUM
PRESSURE
TRIBUTARY
AREA
TRIBUTARY AREA
TOTAL FORCE
"MINIMUM FASTENER
''COUNT -per SIDE
1
-56.1 psf
15.00 SF
841.50 lbs.
6***. OK
2
PART OF ASSEMBLY WITH WINDOW 1 & DOOR I (see above)
3
-56.1 psf
3.67 SF
205.88 lbs.
2*** OK
4
-56.1 psf
3.67 SF
205.88 lbs.
2*** OK
5
-69.3 psf
3.67 SF
254.33 lbs.
2*** OK
6
-56.1 psf
6.875 SF
385.69 lbs.
3*** OK
7
-56.1 psf
4.00 SF
224.40 lbs.
2*** OK
*13A5ED ON A5CE 7- 10 with 170
MfH Vult, EXPOSURE D ENCL05ED
30'MEAN HEIGHT, 5: 12 PITCH, wWh
Kcl=0.85 u5incj the ALLOWABLE
5TRE55 DE51GN method. THESE
VALUES ARE REFRE5ENTATIVE Of
THE.MINIMUM ALLOWABLE
TR15UTARY AREA (TEN 5QUARE-ff EET),
AND 50 ARE HIGHER THAN THE
ACTUAL PRESSURE ON THE
COMPONff N.T.
**ffA5TENff R SHEAR�TOLERANCE HAS
.E3IfSEN_13A-5f_D__(5N__I/-4" CONCRETE
-SCREW ANCHOR5 (TAf'CON or equal)
WITH A MINIMUM ONE�INCH (I")
EM13EDDMENT INTO MEDIUM WEIGHT
HOLLOW E3LOCK WITH A 4:1 fACTOR
Of 5Af ETY (25% ULTIMATE LOAD).
f URTHER LOAD REDUCTIONS HAVE
5EEN APFLIED fOR LESS THAT
NOMINAL 5FACING AND EDGE
D15TANCE, TO GIVE A WORKING
ALLOWABLE LOAD Of I G2 Ib5. FER
ANCHOR, a MINIMUM Of TWO (2)
ANCHORS 15 REQUIKED rOREACH
SIDE.
-ADDITIONAL fA5TENER5 MAY 5E
REQUIRED PEP, MANUfACTURER
SPECIFICATIONS. CONTRACTOR
.5HALL, K�f ER TO. THE APPROPRIATE
NOA OR APPROVAL PRIOR TO
INSTALLATION.
M = MULLION IN WINDOW A55EMBLY
NI = NOT IN5ATLI_IfD AT THE TIME Of'
TH15 ENGINEERS IN5FECTION.
OK = INSTALLATION Of THE WOOD
13UCK fOR TH15 COMFONENT
15 ADEQUATE.
18-022 Sion Homes ref Aquavista\Drawings\Structurc3l\Lc>t 2\18-022 AQVSTA LOT 2 STRUCTURAL-2.5.dwg
C+
r)
(D 0
0
(D 0
(D 0
0
M GrQ
C,
(D
d'q CD
m
tj
Irq
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ca
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15T f LOOK DOOR
ATTACHMENT 5CHEDULE
MARK
*MAXIMUM
PRESSURE
TRIBUTARY
AREA -
TRIBUTARY AREA
TOTAL FORCE
**MINIMUM FASTENER
COUNT per SIDE
101
-56.1 psf
11.625 SF
652.16 Ibs.
4*** NI.
102
-42.1 psf^
37.50 SF
1
1,578.75 Ibs.
-----------
10*** OK
103'
--56.1 psf
14.90 SF
8,35.89 Ibs.
.6*** OK
104
-42.1 psf�
50.00 SF
2,105.00 Ibs.
1,3*** OK.
105
-69.3 p�f
30.00 SF
1,683'
.00 Ibs.
!1*** o-K
15T FLOOR WINDO-W--`
ATTAC._HMfNT_5_C___j4EDULE
MARK
*MAXIMU_V_--TRIBV_TARY
-PRESSURE
AREA
TRIY-UTARY AREA
TOTAL FORCE
"MINIMUM. FAST -
ENER:
C'OUNT'per'SIDE
101
-56.1. psf
1.50 517
-SF-
84.15 Ibs..
2*** O-K
102
-56.1 p§f
-
1.56
84.15. Ibs.
.....2*** OK
103
56.1 psf
3.125 SF
175.31 Ibs.
2*** OK'
104
-69.3 psf
2.50 SF
173.25 Ibs.
2*** OK
105
-56.1 Osf
2.50 SF
14.0. 2�5 1 b s.
2*** OK
106
-56.1 p�f
-
2.50 SF
140.25 lbs.
.2*** OK
107
-56.1 psf
8.00 SF
448.80 Ibs.
3*** OK
3
108
NO WINDOW "108" per ARCHITECTURAL PELANES
log
-56.1 psf
2.50 SF
140.25 Ibs.
2*** OK
110,
-56.1 psf
5.00 SF
�_80.5 Ibs.
2*** OK
ill
-56.1 psf
-psf
8.00 SF
�48.80 lbs.
3*** OK_
112
-69.1�
3.33 SF
230.77 -lbs.
2*** OK
*15A5ED ON A5CE 7-10 with 170
MPH- Vult, EXPOSURE D ENCLOSED,
30'MEAN HEIGHT, 5:12 PITCH, with
Kd=0.85 usincj the ALLOWABLE
STRESS DESIGN methocl. THESE
VALUES ARE REPRESENTATIVE Of
THE MINIMUM ALLOWABLE
TRI 5UTARY ARE A (TE N 5QUARE-fEET),
AND 50 ARE. HIGHER THAN THE
ACTUAL PRESSURE ON THE.
COMPONENT.
**f:A5TffNIfR SHEAR TOLERAN61f HAS
13EEN [5A5ED-ON- 114" CONCRETE
PEW ANCHORS (TAP60N. or equal)
WITIf A MINIMUM ONE -INCH (I
EMBEDDMENT INTO MEDIUM WEIGHT
HOLLOW BLOCK WITH A 4:1 f:ACTOR
Off SAf ETY (25 % U L-TI MATE LOAD).
fUP\THf-P\ LOAD'REDUCT15NSHAVE'
BEEN.APPLIED FOP, LE55 THAT
NOMINAL SPACING AND EDGE
DISTANCE, TO GIVE'A WORKING
'.A.LLOWA5LIf LOAD Of I-G2 IL95. PER
ANCHOR. a M;NIMU�4-'Of TWO (2)
ANCNOR5 15.REQUIRED fOR EACIf
'ADDITIONAL IA5TENER5 MAY BE
REQUIRED PEP, MAN I UfACTUKER
5PECIfICATION5. CONTRACTOR
SHALL REfER TO THE APPROPRIATE
NOA OR APPROVAL PRIOR TO
INSTALLATION.
�MAMMUM PRESSURE. ON LARGE
OPENINGS (100 5CIft OR GREATIfR)
HAVE'REDUCED VELOCITY
PRESSURES IN ACCORDANCE WITti
A5CE 7-10.
M = MULLION IN WINDOW A55EM[3LY
NI = NOT IN5ATLLf_D AT THE TIME OF
TM15 ENGINEERS INSPECTION.
3K = INSTALLATION Of: THE WOOD
13UCK fORTHI5 COMPONENT
15 ADEQUATE.
J:\18-022 Sion Homes ref Aquavista\Drawings\Structural\Lot 2\18-022 AQVSTA LOT 2 STRlJtTLlRAL_2.5.dwg
0
(D 0
0 0
(D
cn
(D 0 0
(D 0
0
>
.4
0 CID
g,
CD
CD
arq
q Sko
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CD
ca �:Jt4
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cz
2nd ff LOOK DOOR
ATTACHMENT 5CHEDULE
MARK
*MAXIMUM
PRESSURE
TRIBUTARY
AREA
TRIBUTARY AREA
TOTAL FO.RCE
"MINIMUM FASTENER
COUNT per SIDE
201
-56.1 psf
16.00 SF
897.60 lbs.
6*** OK
202
-56.1 psf
16.00 SF
897.60 lbs.
6*** OK
.2nd f LOOP, WINDOW
ATTACH M ENT 5CH EDU LE
-
MARK
*MAXIMUM
P R E S-S IJR_E_j-ARE
TRIBUTARY
TRIB_U-T_A-RY-ARF�_A_
TOTAL FORCE
"MINIMUM. FASTENER'
COUNT per_'l'_.SIPE
-69.3.
psf
3.125.
5F
216.56 lbs.
2*.**
OK-
20.2
-56.1
-p'sf'
6:25'
SF
4,33.1-3 lbs.
OK
203
-56.1
psf.
3.125
SF
216.561-'Ibs.
�2***
OK;
204
-56.1.-
p8f'
4.6 7...
3 F
262.OQ . lbs.
2*.**,
OK:
20-5
-56.1
psf
-.4,.67
SF'
262.00 lbs.
2***
OK' ?
206
-56.1
p S'f
4.67..SF
262.0 . 0 . lbs.
2***
OK'
207'
NO WINDOW "207" per ARCHITECTURAL PLANS
208
-69.3
psf j
6.25
SF
433.13 lbs.
3***
OK
209
-69.3
psf
2.50
SF
173.25 lbs.
2***
OK
210
-56.1
psf
7.50
SF
430.75 lbs.
3*** M
OK
211
-56.1
psf
2.50
SF
140.25 lbs.
2***
OK
212
-56.1
psf
1.50
SF
84.1 , 5 lbs.
2***
OK
213
-69.3
psf
2.25
SF
155.93 lbs.
2***
OK
214
-56.1
psf
2.'25
SF
126.23 lbs.
2***
OK
*15A5ED ON A5CE 7- 10 with 170
MPH Vult, EXP05URE D ENCL05ED,
30'MEAN HEIGHT, 5:12 PITCH, with
Kcl=0.85 U51ncj the ALLOWABLE
5TRE55 DE51GN method. THE5E
VALUE5 ARE'REPRE5ENTATIVf Of
THE MINIMUM ALLOWABLE
TRIBUTARY AREA (TEN 5QUARE-ff-ET),
AND 50 ARE HIGHER THAN THE
ACTUAL PU55URE ON THE
COMPONENT.
**fA5TENffR SHEAR TOLERANCE HA5
15EEN BA5ED ON 1/4" CONCRETE
5CREW ANCHOP,5-FA-P-CON-or 6q_ual)
_-WITH-A-MINIMUM ONE -INCH (I")
EM13EDDMENT INTO MEDIUM WEIGHT
HOLLOW BLOCK WITH A 4:1 fACTOR
Of 5AFETY (2517. ULTIMATE LOAD).
fURTHER LOAD REDUCTION5 HAVE
BEEN. APPLIED fOR LE55 THAT
NOMINAL 5FACI.NG AND EDGE
D15TANCE, TO GIVE AWORKING
ALLOWABLE- LOAD Of 1 G2 lb-g.. PER
.ANC.HOR, a MINIMUM Of TWO (2)
ANCHOR5 15 RE QUIRED -fOR EACH
51DE.
"'ADDI ' TIONAL ' fA5TENER5 MAY BE
REQUIRED PEP, MANUfACTURER
5PECIfICATION5. CONTRACTOR
5HALL REf ER TO THE APPROPRIATE
NOA OR APPROVAL PRIOR TO
11\15TALLATION.
M = MULLION- IN WINDOW A55EMBLY
NI.= NOT IN5ATLLff D AT THE TIME Of
TH15 ENGINEEK5 IN5PECTION.
OK = 11\15TALLATION Of THE WOOD
DUCK FOR TH15 COMPONENT
15 ADEQUATE.